I was generally agreeing with you, but this is in fact relevant, if you're a Democrat.
Both parties have no issue with child concentration camps, or for that matter war crimes or Wall Street crimes.
I would add that Pelosi willingly funded the child concentration camps, as well as voting an even greater increase in the "Defense" budget than Trump asked for.
If you're arguing as a Democrat, you have no standing on this issue at all. (Me? I'm a Socialist living in Amsterdam, but I unfortunately am still paying US taxes.)
Probably better to drop this whole part of the argument, because there are 1000 other things you can hammer on.