Now you went full retard (especially calling it theft and so). You should realize that no matter how brilliant idea or work you bring to the table, it's not your table at all. Imagine you make apple pie from apples that others collected. How does it now entitle you to decide who can eat it? And how could you just take it with you when you quit?
You should be able to grasp basics of teamwork without having them in any form of contract or agreement.
You should realize what this situation is. "Theft" - why not, saying, that you are owner of something what doesn't belongs to you is for you ok? People who done some stuff think, that they've done their work for project, not for public. Personally I don't care about my releasing revision changes, because everything I made is to do in few seconds/minutes.
I won't answer on any your future personal attacks, calling someone retard without knowing mean of it is just.. You could use "idiot" or something, but calling someone retard is offence for me, as well as for retards, as you are trying to understand it like some other word to offence someone. It's not nice..