Rep Broun is hardly a valid example and I doubt anyone outside of his Georgia district has even heard of him. You can only really count him if we can state the democrats are clearly racist and use local democrats as examples.
Both sources you mentioned Rubio have a clear biased. You don't even have to read past the headline to figure that out.
But even taking it as truth, Rubio did not say the earth was created 6 thousand years ago. He was talking about the length of the actual creation event.
"Whether the Earth was created in 7 days, or 7 actual eras, I’m not sure we’ll ever be able to answer that,” Rubio told GQ in an interview. “It’s one of the great mysteries.” "
I know you prefer people that just give lip service to Christianity (Obama), but to discount people based on their belief in God is just as ridiculous as discounting people for their lack of belief.