It's a pretty easy question to answer-- a loud, vocal, "Christian" minority in this country are still trying to legally discriminate against the LGBT community. They actively try to pass legislation (at the state and federal levels) to limit the civil rights of a gay Americans, be in employment, housing, or marriage.
As long as these "Christians" continue to force their spiritual hypocrisy on this country, it will still be a big deal when anyone, famous or not, declares their orientation openly.
"I shall stay until the wind changes."