Honestly, I don't think this points to the problem why people are almost prejudice against other classes. It's that people too often like to stereotype a whole entire class off of a few people they have encountered. Your example of how a hunter acts doesn't really mean anything because that guy would have been just as much of a jerk whether he was a titan or warlock. One person does not represent the entire group. Along with the example, even with the screenshots, it seems as if those screenshots show that situation out of context and doesn't show everything said in the conversation. The guy was clearly offensive, but you could have said something that also triggered that reaction- but I wouldn't know since I haven't seen the original thread.