Incest is taboo almost universally among humans, and for very good biological/genetic reasons, aside from the moral ones. I think your "phobia" is well-grounded in reality.
Bert and Ernie are different (tall/short, dark/light, etc.) but are best friends. They're a great model for the idea that people who are different can get along. Having them both be male allowed them to be best buds without the assumed hint of romance if one of them had been female -- it's rarer in real human relations for a male and female to just be best buds.
The idea that Bert and Ernie must be homosexual just because they share a room and are best friends is offensive to the vast majority of people who have had same-sex roommates. There could be no greater, clearer demonstration that the homosexual activists will stop at nothing, than this unfortunate petition.
Very Well said, dayglored.
Your statement IS, in fact, the opinion of the majority. We realize that homosexuals deny this fact, but it is a fact, nevertheless. This spectacle that they have, for years, emboldened themselves to perform for society, has become just another sad reality of why the human condition is an absolute failure.