Try viewing the commies statement as shorthand for “The only good insurrectionist for a tyrannical hellscape regime is a dead insurrectionist for a tyrannical hellscape regime.”

Much like “The only good child molester is a dead child molester,” it has to do with behavior and threat to innocents.

“The only good Jew is a dead Jew” has to do with ethnicity and/or religion. Neither of those traits necessitate threat to innocents.

You’re giving these attitudes false equivalence.