"Contrary to all evidence" is not quite true. There were a couple of places where Obama was stated to have been born in Kenya:

https://www.snopes.com/fact-check/promotional-booklet/

https://web.archive.org/web/20091020224623/http://www.npr.or...

I think the preponderance of evidence shows that he was born in Hawaii, but it's not "racist" or a "conspiracy theory" just to ask questions about it. It's more disturbing, IMO, to be a "status quo theorist" and refuse to even entertain one idea or another.