Basics on Al-Wal'aa Wal Bar'aa

The following is only temporary, and will be updated and revised with more evidence and points Insha'Allah.

------------------------------------

Firstly, lets look at Ibrahim (AS) and how he treated and associated with the kuffar

60:4 There is for you an excellent example (to follow) in Abraham and those
with him, when they said to their people: "We are
clear of you and of whatever ye worship besides Allah. we have rejected you, and there has arisen, between us and you, enmity and hatred for ever,- unless ye believe in Allah and Him alone": But not when Abraham said to his father: "I will pray for forgiveness for thee, though I have no power (to
get) aught on thy behalf from Allah." (They prayed): "Our Lord! in Thee do we
trust, and to Thee do we turn in repentance: to Thee is (our) Final Goal.

قَدْ كَانَتْ لَكُمْ أُسْوَةٌ حَسَنَةٌ فِي إِبْرَاهِيمَ وَالَّذِينَ
مَعَهُ إِذْ قَالُوا لِقَوْمِهِمْ إِنَّا بُرَاء مِنكُمْ وَمِمَّا تَعْبُدُونَ مِن
دُونِ اللَّهِ كَفَرْنَا بِكُمْ وَبَدَا بَيْنَنَا وَبَيْنَكُمُ الْعَدَاوَةُ
وَالْبَغْضَاء أَبَدًا حَتَّى تُؤْمِنُوا بِاللَّهِ وَحْدَهُ إِلَّا قَوْلَ
إِبْرَاهِيمَ لِأَبِيهِ لَأَسْتَغْفِرَنَّ لَكَ وَمَا أَمْلِكُ لَكَ مِنَ اللَّهِ
مِن شَيْءٍ رَّبَّنَا عَلَيْكَ تَوَكَّلْنَا وَإِلَيْكَ أَنَبْنَا وَإِلَيْكَ
الْمَصِيرُ

The Ulam'aa have also given their opinion on the matter:

The Shaykh Muhammad ibn ‘Abdul-Wabhab (Rahimullah) said,

“The basis (Asl) of the religion of Islam and its basis (Qa’idah) lie in
two matters:

“The First: The command to worship Allah alone with no partners associated
with Him and the encouragement upon this with the allegiance based upon it and
the declaration of disbelief (Takfir) of whoever leaves it.

The Second: The warning against Shirk in the worship of Allah and being stern in that and having enmity based upon that and
the declaration of disbelief (Takfir) of whoever commits it.”

The Shaykh Hamad ibn ‘Atiq (Rahimullah) says:

“So his saying ‘…and there has become apparent…’ In
other words, it has become clear and apparent. And consider the preceding of
‘…enemity…’ with ‘…hatred…’ because the first is more important that the second.
This is because; the person may hate the polytheists (Mushrikin), while not
taking them as enemies, So (if this were the case,
then) he would not have come with the obligation that was upon him, until he
attains both the enmity and the hatred. And it is a must, as well, that the
enmity andhatred are both open and apparent and clear. And known that even if
the hatred is tied to the heart, then it does not benefit him until its effects
are shown and its signs become clear. And that abandonment (of them). Then and
that point, the enmity and hatred will become apparent. “

[This reference was taken from Sabil An-Najat
Wal-Filak]

“Whosoever does not forbid people from the deen of the Jews and Christians
after the prophethood of the messenger Muhammad (saw) nor declares them kafir nor hates them, he is not a Muslim by the
consensus of ALL Muslims, their scholars and the general
public.”

Shaykh Al-Islam ibn Taymiyyah (Rahimullah) v27
p264,

"There is ijma' amongst the scholars of the Salaf - as well as the Khalaf,
from the Companions, the Tabi'in, the Imams, and all of Ahl as-Sunnah - that a person cannot be a Muslim without avoiding major Shirk and disassociating from it and those who commit it, and hatred and enmity towards them as much as he is able, and the sincerity of all of his actions to Allah."

['Abd ar-Rahman bin Hasan; 1/93]

"[Disbelieving in Taghut] is to disassociate yourself from all that is
believed in other than Allah, whether it is a Jinni, a human, a tree, a rock, or other than that; and to bear witness to the disbelief and misguidance of whoever takes them as deities, and to hate him, even if he is your father or your brother. As for the one who says: 'I worship none but Allah, but I will not oppose the the deceased pious people and the domes built over the graves,' or the like of that, then he is a liar in his saying 'La ilaha ill Allah,' and he has not believed in Allah, nor has he rejected Taghut."

[Muhammad bin 'Abd al-Wahhab; 1/96]

Clarification

Before I get bombarded by "well we have to do daw'ah, how will we do dawah"?:

Shaykh Muhammad al-Saalih al-‘Uthaymeen (Rahimullah):

Undoubtedly the Muslim is obliged to hate the enemies of Allaah
and to disavow them, because this is the way of the Messengers and their
followers. Allaah says (interpretation of the meaning):

“Indeed there has been an excellent example for you in Ibraaheem
(Abraham) and those with him, when they said to their people: ‘Verily, we are free from you and whatever you worship besides Allaah, we have rejected you, and there has started between us and you, hostility and hatred for ever until you believe in Allaah Alone’”

[al-Mumtahanah 60:4]

“You (O Muhammad) will not find any people who believe in Allaah
and the Last Day, making friendship with those who oppose Allaah and His Messenger (Muhammad), even though they were their fathers or their sons or their brothers or their kindred (people). For such He has written Faith in their hearts, and strengthened them with Rooh (proofs, light and true guidance) from Himself”

[al-Mujaadilah 58:22]

Based on this, it is not permissible for a Muslim to feel any love
in his heart towards the enemies of Allaah who are in fact his enemies too. Allaah says (interpretation of the meaning):

“O you who believe! Take not My enemies and your enemies (i.e.
disbelievers and polytheists) as friends, showing affection towards them, while they have disbelieved in what has come to you of the truth”

[al-Mumtahanah 60:1]

But if a Muslim treats them with kindness and gentleness in the
hope that they will become Muslim and will believe, there is nothing wrong with that, because it comes under the heading of opening their hearts to Islam. But if he despairs of them becoming Muslim, then he should treat them accordingly. This is something that is discussed in detail by the scholars, especially in the book Ahkaam Ahl al-Dhimmah by Ibn al-Qayyim (may Allaah have mercy on him).

Majmoo’ Fataawa al-Shaykh Ibn ‘Uthaymeen, 3, question no.
389.