Why should I care about what some other gods to say to other people? I'm only interested in what my gods say to me. But if they're pushing it on people, then there's going to be a fight.
I, personally, wouldn't waste my time fighting with someone about it. I've let people preach in my face on a few occasions, and a few times I just said I didn't want to discuss it and if they didn't stop, I just walk away.