There are plenty of arguments as to why illegal migration is wrong. I don't agree with many of them, but if you can categorically prove to me that it's wrong every single time, I'll believe you. What even is your point? Every comment it seems to change. I don't morally believe you should be deported if you enter illegally, but legally, you should (at least in the US). There is a difference between what's illegal and what's immoral (note Apartheid South Africa).
My point is that there is no evidence to suggest Harris allowed any sort of criminal invasion through the southern border.