You have to keep repeating yourself because you are wrong.Your math is leading to contradictions. You admit this yourself. This should be enough for you to admit that you are doing something wrong. Instead you have decided that your mistake means other people (including people who actually undery what they are talking about are mentally deficient.
1. Length in one frame of reference is not the same as it is for another frame. This fact is pretty basic.
2. You are the one arriving at basic contradiction is your mathemarics. I don't have this problem.