Thieves, murders, fraudsters, etc
Illegal immigrant doesn't seem especially derogatory for someone who illegally immigrated.
I think it would be better to focus on the fact their felony crime rate is far below the native population than arguing over a pretty tame word used to describe them.
https://books.google.com/ngrams/graph?content=illegal+immigr...
Look at the amount of legal immigration:
https://www.migrationpolicy.org/programs/data-hub/charts/ann...
There have been plenty of people who have been in this country without appropriate paperwork historically - they were never called illegals (see above). In fact even now people make differentiations between "visa overstayers" and people who snuck across the border, even though both are technically illegal aliens.
I think you don't have to go far to see the implications.
1. you seem to be implying that during periods of "white" immigration, americans were fine but the public changed their tune when it became south american/asian. However, irish/italian immigrants also received pushback. Specifically, irish were hated because they were catholic, and itlians weren't considered white back then.
2. You can also flip this around to say that as a society, we've gotten more accurate with our wording. Rather than lumping all immigrants (legal and illegal) into one bucket, we take care to point out that we're only against the illegal type of immigration. That seems like a win to me.
It's just shorthand for "person who has immigrated illegally" anyway, arguing over these words is a distraction. You have any solutions?
https://www.migrationpolicy.org/programs/data-hub/charts/ann...
The current legal immigration levels are way too low, hence people breaking the law trying to establish roots in the country (or fleeing persecution elsewhere). We used to call people foreign-born instead of illegal, and not care about their immigration status at all. Oh, wait - that's when the Europeans were immigrating: https://www.migrationpolicy.org/programs/data-hub/charts/ann...
If many many people are breaking a law (i.e. jaywalking), one should consider whether the law is actually reasonable in the first place.