Peace Aaleyah
2221 And do not marry the female rejector until they believe. For a believing female servant is better than a rejector even if she attracts you. And do not marry the male rejector until they believe. For a believing male servant is better than a rejector even if he attracts you. Those invite to the Fire, while God is inviting to the Paradise and forgiveness by His consent. He clarifies His revelations for the people that they may remember.
So who are Believers
262 Surely those who believe; and those who are Jewish, and the Nazarenes, and the Sabians, whoever of them believes in God and the Last Day and does good works; they will have their recompense with their Lord, and there is no fear upon them, nor will they grieve.
282 And those who believe and do good works, they are the people of Paradise, in it they will abide.
2277 Those who believe and do good works, and hold the contact prayer, and contribute towards purification; they will have their recompense with their Lord and there is no fear over them nor will they grieve.
So who are rejectors
737 Who is more wicked than he who invents lies about God, or denies His revelations? These will receive their recompense from the record; so that when Our messengers come to terminate their lives, they will say ?Where are those whom you used to call on besides God?? They said ?They have abandoned us!? And they bore witness upon themselves that they were rejecters.
745 ?The ones who repel from the path of God, and sought to make it crooked; and regarding the Hereafter they were rejecters.?
So what happens when Believers associates with Rejectors
328 Let not the believers take the rejecters as allies instead of the believers. And whoever does so will have nothing with God; for you are to be cautious of them as they deserve. And God warns you of Himself, and to God is the destiny.
4144 O you who believe, do not take the rejecters as allies instead of the believers. Do you want God to have a proof against you?
Regards
BalaChandran
I strongly believe most of these verses are taking out of context, i have come to notice that the word you translate as rejector (Kaafir) when used in the Quran always has a context in which it is used in the context in which these verses are used. i think the 4.144 is in clear reference to hypocrites in the preceding verses before it and those after it. and we know that hypocrites are not just rejecters they are people with an agenda to distort and destroy God's religion it really has nothing to do with marriage or friendship with non-muslims. So please take note