You don't think that the South's centuries of chattel slavery, and then a century of formal apartheid, and now a kind of less formal apartheid doesn't have a lot more to do with why black Americans face barriers to entry to middle-upper-class professions?
No, it's the immigrants' fault...
(I wonder who you blame for lack of black Americans in C-level positions, doctors, lawyers, politicians, various millionaires and billionaires, etc. Not that many folks from India in any of those, so immigration from Asia can't be it...)
There’s plenty of reasons why black American’s fail to succeed, but in IT, the availability of cheap H1B is absolutely a factor. I worked in a Fortune 500 company who hired a ton of engineers from historically black colleges and universities. Probably 30 engineers in our group of around 200. After 4 years many weren’t working out and were let go. Of the 30, I believe just 4 remain. Since then, the company has hired almost exclusively H1B for those positions. Was there a competitive problem with those newly minted engineers, yes. But, they were effectively replaced by H1Bs.
No, it's the immigrants' fault...
(I wonder who you blame for lack of black Americans in C-level positions, doctors, lawyers, politicians, various millionaires and billionaires, etc. Not that many folks from India in any of those, so immigration from Asia can't be it...)