If you do enough research through multiple, reputable sources trends do emerge. If someone says something radical like the president is a lizard person and every news outlet is pretty convinced he was born in the US to human parents then it’s safe to work with the understanding that he’s a human-as a silly example to illustrate the concept.
As a counter example, I thought roughly 25% of Americans thought Obama was not born in America, despite the birth certificate? And that a similar percentage believe the Bible is the literal truth of God?
While I am aware that he was born in the US (Hawaii), i can see where the confusion might come from (aside from willful ignorance and hatred for him as a person), considering that he was the first president born outside of the continental US (Hawaii; and we all know how many continental americans still don’t realize that Puerto Rico is a US territory) and lived in Indonesia between ages 6 and 20.
Oh yeah, agreed. It definitely didn't help the case that some prominent public figures fell for this as well (or did it intentionally knowing that was false, who knows), which helped propagate the misinformation even further.