Everyone gets angry about random stuff all the time. I guess to some degree I used to get a lot more angry at people on the internet than I do now because at some point you just have to realize that people are going to disagree with you. That's just how it is. It's OK. And if it really bothers you, put some time between yourself and them so you can cool off and do something else for awhile to get your mind off of it. You will pretty much never feel better about anything if you stay wound up all the time over some random person who said something you didn't like.