When do people really mature?

Stupid question? Maybe . . . but, I'm in the 8th grade, and my teacher can barely talk without somebody cracking a stupid joke of some sort, and the rest of the idiots laughing along. At the slightest hint that another is homosexual, somebody will shout out that they're gay, will then be shunned and usually avoided if further proven by the idiotic investigators who won't stop nosing around, scooting away because apparently now gays aren't like straight people, and have feelings for every single person of the same gender. They spit and bully kids who are suddenly inferior for the clothes, which are provided really for warmth, the hair, which, who gives, for the looks, the height, the weight, I mean, when will this stop? I can't write in my notebook in school when I have the free time, because I'm scared I'll get ridiculed 24/7 (stupid of me, as well as them) for my fantasy writing. I'm Jewish, and some 'hilarious' jackass asked if I had a picture of Hitler in my room (which makes no sense anyway) and if I had 'one of those weird hats' and why we have our own language that sounds apparently like pure gibberish. Two kids in my art class say certain words in English to a Chinese kid who just moved from China, and as they laugh, he takes it as a friendly gesture, and that they are saying friendly words, and laugh along. I mean, really? Laughing at a kid who barely knows English? I could give SO many examples, but I just want to know - these kids are 13-15, and couldn't handle seeing an Indian or Arab without making terrorist jokes. Is it because our way of disciplining has gotten so much weaker? It's just horrible, horrible that I can't walk down the hall without having some idiot want to fight me because he thinks he needs to prove something, some idiot that I barely know.