The question Are the following claims flaws in Relativity? was closed for not being mainstream physics, and it received a number of down votes.
Now, I haven't studied SR past brief coverings in my undergraduate and graduate classes, and I haven't really covered GR beyond knowing its conceptual underpinnings, so I could be missing something. But I can't see why this question was poorly received. It just looks like a question asking about the compatibility and validity of SR and GR. There are even well-received questions covering the various parts linked to by one of the close voters. If anything, I could see it being closed as lacking focus, but the two claims do seem to go together into a single post asking about how these theories work together.
So what am I missing here? Why is this a poor question, and why is it non-mainstream? Hopefully such a discussion will help me know how to interact with other SR/GR questions in the future.