That's the opposite of what communism is.
I'm afraid this just reflects more of the thinking that communism is "what happened in the USSR". As opposed to a political system set out by Marx in his writings.
No, it's an understanding of the fact that any imposed communist system HAS to be top down. Marx acknowledged as much, which is why he advocated for a more organic transition to communism rather than having it imposed by rebellion or government mandate.
Of course, I think he was rather naive ... communism will never arise organically because we're inherently a competitive species living in a universe subject to entropy. But that's beside the point; communism - in any form that's ever been tried - is inherently top-down. The musings of Marx have no bearing on what communism is in practice.
How many of the countries that the USA has performed regime change in continue to be repressive? How many right wing totalitarian governments have there been?
The answer to your first question depends on how you're defining regime change ... though we can generalize and say "half or more".
"Right Wing" is such a loosly defined concept that the answer to your second question can be, "all of them", " none", or anything in between.
Not sure what either question has to do with the topic, though.
My theory is that isn't not the political system that breeds repression, but that people brought up under one repressive system will tend to learn the lesson and be repressive when they get their chance at power. I believe the stats correlate closer with my explanation.
I believe your explanation is just a less accurate rephrasing of my explanation. I said essentially the same thing, with the added caveat that the type of government can make abuse of power easier or harder. If you disagree with that, I'd love to know why.