We have decades of hard evidence that only a certain type of immigrant is successful and increases overall productivity. You want to ignore the wealth of data because "America was bad in the past".

Simple game theory: we have two choices - A. focus immigration on high skill or B. focus immigration on low skill. If by some possibility you're right, and all people are blank slates and genetics is fake, then either choice is correct. If I am correct (suggested by ~50 years of hard data), then choice A is a huge boon to the country, while choice B bankrupts the country.

It is astonishing that you are pushing for choice B with this knowledge. Like I said before, the worst thing for those left-of-center is thinking that there may be some inherent differences in different populations. It's the worst thought that could enter their mind. They live their entire lives trying to prove to people that they don't think this. This (plus knowing that you have enough money to shield yourself if the ideas that you advocate end up being destructive), allows you to virtue signal without a care.