Hey guys, I found the Great Replacement theorist. He's over here. /s
Chill dude. Maybe you forgot America is a "Nation of Immigrants".
It might also be news to you that American corporations are mostly staffed and lead by white Americans! [1]
Let me just grab that citation for you, since I know you're not too keen on searching for these kinds of facts for yourself:
"In the tech sector nationwide, whites are represented at a higher rate in the Executives category (83.3 percent), which typically encompasses the highest level jobs in the organization. This is roughly over 15 percentage points higher than their representation in the Professionals category (68 percent), which includes jobs such as computer programming. However, other groups are represented at significantly lower rates in the Executives category than in the Professionals category; African Americans (2 percent to 5.3 percent), Hispanics (3.1 percent to 5.3 percent), and Asian Americans (10.6 percent to 19.5 percent)."
[1] https://www.eeoc.gov/special-report/diversity-high-tech
P.S. - now listen, I understand where you're coming from. My SO complains I listen to too much Fox News. But you gotta be a little bit smarter than that. Do your own research. Sip a little lemonade. And chill out.