Jersualem has been the capital anyway, so no matter what trumps says, he didn't change much. It's all about what people believe, that's the problem.
I completely agree with your post. Israel has been controlling Jerusalem ever since 1967, when it single-handedly defeated the Arab alliance. The Palestinians lost the war and therefore they should keep quiet. If they have a problem that, then they are free to immigrate to the 50+ Muslim nations around the world, such as Saudi Arabia and Kuwait.