What about is always a bad answer. It comes of a defensive.

Indeed, I agree with you. There are US citizens who want to do reprehensible things, and I still say: maybe the US is not their jam. No, I'm not advocating exile or illegal detention. Just stating a fact.

the whole "not your jam" thing seems to be you retreating to meaninglessness. this isn't a debate about how a person should feel, it's a debate about how a government should act.

When you're talking about due process, "what about these other people who got due process?" is a reasonable response.

Whataboutism would be something like, "what about Nazi Germany, where even more people got sent to foreign prison camps without due process: look, the US isn't so bad!".