Dealing with anti-cycling "friends"

One of my friends (co-worker, actually) posted on Facebook that he had an encounter with a rude cyclist, and he couldn't wait to see the cyclist's ghost bike.

I don't know about anyone else here, but I know there are rude cyclists, just as there are rude drivers, but I don't wish any of them dead. I said as much, and told him he was wrong for wishing the cyclist dead and should be ashamed. He responded that he didn't really care about my opinion and I should keep it to myself, to which I responded that he invited my opinion when he offered his. So he defriended me.

That's all I got really, just a basic Facebook pissing contest. Do you ever encounter "friends" (or people you just know) who hate on cyclists? How do you deal with them? I can let a lot of stuff slide by, but I draw the line at hoping to see a cyclist's ghost bike.