Because they are not the same as the sin of homosexuality, which is a sin against both God and nature. Even more importantly, there are no organized groups out there proudly calling themselves "theives and adulterers", who go about trying to legitimize their sin by pushing for minority status and asking for public funding for their health care, and even promoting their filth amongst our children in public schools. Get it yet?
Wait, you forgot about the Democratic Party.
But I do like your answer.