David From 'Big Brother' -- Still Rooting for Aaryn ... Despite the Racist Stuff

Evicted "Big Brother" guest David Girton -- the blonde surfer dude who made out with Aaryn -- says he's still rooting for his on-screen flame ... despite all the racist crap she's said inside the house.

David -- who got the boot in week 1 -- tells TMZ he didn't hear many of Aaryn's offensive comments when he was in the house ... but says he was "shocked" when he watched the footage at home.

"People are saying I'm racist too because I was with Aaryn," David says ... "That is not me."

David says he's not convinced Aaryn's a bigot -- but will continue to watch the show to see her "true colors." In fact, he says he's still rooting for Aaryn to win.

So how does Dave's MOTHER feel about his BB experience?

“My mom is glad I got off the show early. There are a lot of mean people on the show. She was worried that if I was on the show longer, they would have an impact on me."