It’s not “off limits”. It’s just hyperbole.
The reservation system may have been an inspiration, but it wasn’t like Nazi gas chamber camps either. I suppose he took our evil deeds to a whole new level that hasn’t really been matched since, except maybe in Cambodia .
How many kids were affected by the “kids in cages” thing? A million? 10 million? Oh wait... a few thousand. Yeah... Trump wasn’t very good at the whole “systematic annihilation of Latinos” or whatever he’s being accused of. As I said... hyperbole.
It's ok to admit uyou don't understand what people are talking about when they make the comparison.