Honestly, I just mostly pick whatever is the most offensive. Especially since I usually play this game with some borderline SJWs, so that makes it all the funnier.

What do you mean? How do I avoid pissing them off, to the point that they dont wanna speak with me, you mean?

How can you play CaH when worried about offending people

Well, I'm not. As I said, I deliberately try to offend people. Its not that hard to play CaH without being over-the-top offensive, which is what my SJW-ey friends are doing.

I think I get it, I always try the darkest combinations I can, so it's kinda difficult to imagine an SJW answer
What's the Smell? Auschwitz
How did I lose my virginity? Police brutality

Its actually a lot of fun. I find, that offensive jokes becomes a bit funnier, if somebody recognises how offensive they are.
My friends are enough into social justice, that they sorta hold a bunch of the beliefs, but aren't really all that rightous about it, especially towards me, since I've known them for several years. They get this look on their faces of contradicting emotional states, where they know they should be offended due to their faith, but cant really bring themselves to get into a hissy fit at a friend, especially not when its just a game. Its a blast.