I don't think you're racist. I was only concerned about drama ensuing given what happened when someone used "autism" a while back.

The droids are just bickering friends. I think the gay couple thing may have started with Mad Magazine's parody, which made Threepio limp wristed, and Artoo complaining he was stuck with a "f*g robot". I'm amazed that it was reprinted around the 20th anniversary with that word intact.

I didn't hear or see any gay references to the droids again until The Simpsons.