Should Democrats block all Republican nominees for the Supreme Court...

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23. What 60 vote rule are you referring to?

In your post you suggest the Senate could impeach justices with a simple majority by getting rid of the 60 vote rule.

But the "60 vote" rule doesn't apply to impeachment trials (and the House already can impeach with a simple majority, so I don't think that is what you were addressing). The Constitution requires a 2/3 vote to impeach.

And there no longer is a 60 vote rule for moving a judicial nomination to a final vote. Put another way, a Trump nominee to the court couldn't be filibustered although he or she would still need a majority to be confirmed. Of course, if Trump wins the presidency it is unlikely that the Democrats will hold the Senate.

Finally, most of Biden's nominations have gotten some Repub votes. And I suspect that if by some miracle the Democrats hold the Senate but Trump wins the presidency, there are a couple of DemocratIC senators that would vote to confirm some Trump nominees.