This was always a possibility (and a probability- my friend was a lawyer who went through senior employee emails at whatever company to find incriminating evidence to fire them... 20 years ago). But it's just odd to see somebody do it in realtime, blatantly, while also claiming they are doing some incredible product work.
Maybe twitter's policies were bad, and applied inconsistently. But there is no clear evidence that they explicitly favored one party, and to be honest- I don't really care if they do. If Elon thinks this is some sort of big shock that will cause people to get excited.... I can't really see why.