Why Discriminate?

What is the point of discriminating against the LGBT community. How is it fair that just because someone is different they shouldn't be able to marry who they want to? You don't see gay people trying to ban straight marriage because it's "gross" or "unnatural." This is an example that should be followed by all. I'm not saying that all straight people are the problem, I'm just saying that this sort of discrimination shouldn't be happening. All people were created equal, and they should be treated as such. If some people were able to remember the golden rule from kindergarten then maybe they would have a different reaction to gay marriage, or "marriage" as it should be addressed. There is no harm being done to heterosexuals due to gay marriage, so they should accept that times are changing and adapt.