Except in this case others have already tried the same thing with results going from success to death. It's not unique but it is uncommon. This would speak against it as the "best way".

It's hard to convince someone bigoted against you to be your friend. If they won't be your friend the whole concept fails. This shouldn't need to be stated.

Often bigots closest friends are also bigots. Again causing issue. If one close friend points out your shortcomings but the others tell you they aren't shortcomings at all it's much easier to stick with your comfort zone, as it almost always is. Repeated efforts here cause a friendship to falter, which goes back to what was suggested in the first place, separation.

Friendship works on someone open to it working. Whether they already have that friend or not. You can't force someone to accept something they don't want to hear, which is probably the problem you're having accepting the flaws in your own point of view despite the ways they have been pointed out in other's comments.

From what I'd read in to, you're substituting "best way" for "most moral way" without considering that morality is not a standard. To many reducing harm to the masses is far more moral than making friends with bigots. They can, and must, choose to step outside their bigotry in order to leave it behind. Until then they can deal with being on the fringes.