I wouldn't even think it was my job to handle bigots - but - for the sake of argument - let's say this is what you wanted...
I would venture a guess that if I was carrying hatred and disdain for them - I probably failed before even starting.
Wouldn't you think it might be more effective - to understand them before approaching? - But maybe - even back up a little - wouldn't it be more effective to understand yourself first - before being able to understand them?
Then , maybe, approach them - once you got rid of all your upsets and all your hatred and disdain....
It does not mean that you would actually agree with them or even think any better of them - but at the very least - you would be approaching them with a clear perception of what you were trying to accomplish and you would also be more effective if you weren't just there to satisfy your emotional needs/issues/hate/disdain etc.