Not quite.

Stalinism/communism provided you a moral/ideological choice: to be part of it or to oppose it. Although sometimes people who were taking the side of stalinism and were active in whistleblowing and finger pointing in the name of ideological purity were later repressed themselves.

Nazism, on the other hand, gives you no choice if you are a jew. It is already decided for you.

But again, stalinism was awful. I am not going to defend it. I too have some far relatives who died because of it. My grandmother survived thanks to luck. But to compare communism or even stalinism to nazism is wrong.