“ Google will show you that the overwhelming majority of American inventors throughout history have been African-American.”

It could just be that there is a lot of activity on the web around African-American inventors which Google is reflecting. Google isn’t an encyclopedia.

Their campaign against misinformation is purportedly intended to reduce the spread of lies and propaganda. There might be some collateral damage where sources of lies and propaganda get generally downgraded (even when telling the truth), but is that really a problem? Most of us do that in our interpersonal relationships. If you are a liar, I’ll tend not to believe you, even if when you tell me something true. (I’ll assume there is some agenda or some part which may be false.)

I don’t feel like you have presented sufficient evidence to support your (apparently politically motivated) case.