The ban in february 2020 was about limiting visas that could result in permanent residency, not travel.
It's now about preventing virus spread, during a pandemic.
If you don't understand why one is based on xenophobia and racism and the other isn't then I'm not sure you should bother continuing with the conversation.
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https://www.theguardian.com/us-news...-impeachment-trump-past-democratic-presidents
“If it is a good idea to impeach and try former presidents, what about former Democratic presidents when Republicans get the majority in 2022?”
Sure. Sounds like a great idea. Do Trump now and in 2022 go after other former presidents that did something illegal.