Is it normal I'm sick of the bullying that goes on here?

It's true that you're not the only mean one and it's probably true that people have been mean to you when you didn't deserve it. Sometimes people are just having a bad day or retaliate without thinking until it escalates. Sometimes not. When you were being what I felt was unkind and harsh to me, I did my best not to be as mean back. I retaliated but tried to control it and keep it more logical than emotional. I'm not perfect, no one is, so of course I fail sometimes. But just because someone is being mean to you or to me, does that mean we need to be mean back? Or be mean to them later on for something else? Or be mean to someone who did nothing to us later on? Let me put it another way: Is it ok for someone to say they whipped their children so hard and frequently that it left scars on their backs because that person's parents did it to them? Or that I should be mean to a Mormon because there was a Mormon who had been mean to me first? While that's an extreme analogy (simply because it gets the point across better), it represents a mixture of an "eye for an eye" and "I'll do it to them before they do it to me". When applied to social situations, that, too, is an immature train of thought that unfortunately a lot of us get taught. But just because we're taught it, doesn't make it right. I mean my father was taught to look down on colored people but he doesn't now and he married my mother who was half Mexican.
I guess what I'm saying is, it's not a very happy way to live. Perpetuating the unhappiness and mistreatment is bad for others and it's especially bad for yourself.
It's kind of like what most great spiritual people in our world have said at one point or another (and great thinkers too, not just believers in a God/Goddess). It's always been along the same lines. "Treat others as you would like to be treated", "Turn the other cheek" (although there's now some speculation on how that one as been translated), and other things like empathy, understanding, and being a source of happiness because it's good for everyone involved. That doesn't always mean don't defend yourself, just that being mean is not good.
This is a website for adults, adults should be mature and to try to make someone else feel small in order to make yourself feel bigger is not the way to do it. You can be smarter than someone or think that you're right or whatever without starting something mean, ya know?