That's a very enlightened way of looking at things. I'm not so Zen.
In my view, you can't be friends with everyone. Some people are douche bags. The guy who started the thread - and weight slammers in general - are douche bags. I do not want to be friends with them. I do not want them at the same gym I am at; and when I'm feeling froggy, I give them a smirk or chuckle when they do douche bag like things.
Of course, I have never said anyone online I wouldn't say to a person's face. What I hate about the Internet is that few follow a similar code of conduct.