why is this happing???

what is wrong with people offending other people rather they are American or Spanish or polish or anything no one likes it they know how it feels to be offended but yet they still do it???its wrong to do to but other people down just to make yourself feel better no one should have to be put down at all it just makes them feel bad and soon they make someone else feel bad and so forth whats wrong with everyone it make me sad to see this going on now and days no one at all should have to be put down.today when i was walking home i saw one of my old friends and his little sister she wanted to go to her grandmas but he wouldn't let her it was understandable why she wanted to because he is always putting her down just because she is younger then her,she is what 5 maybe 6 and he is 12 maybe 13 no one should put there younger sister or brother down or no one for that matter.