I normally avoid being inflammatory. I wrote my original post too quickly and late at night. I agree it wasn't well worded and accepted (almost) all criticisms. I don't think that forgives people saying FU or similar. There is a difference between attacking and crossing the line with epithets.
Thanks for replying. I think you did the best to rectify the problem you created. And I agree that your error doesn't excuse others' errors. You're both wrong (although the initiator is generally seen as being more in the wrong, "who started it").
But the most effective way for you to change this is to change yourself rather than to try change other people. Be the change you want to see in the world.