The issue isn't accepting diversity. The issue is the fact that Christensen said the bakers in Oregon had the right to discriminate against two women who asked for a wedding cake. When questioned about that stance, he then doubled down by announcing a plan he had to be able to do the same as the Oregon bakers which would include lying about their schedule, claiming they would be all booked up and unable to provide that service. No, this isn't about accepting diversity or even claiming to have "gay friends". It's about announcing to the world you think bakers have a right to discriminate and then announce how you will do it in order to not be blatant about it.
One more thing: behaving in a homosexual manner is not the same as *being* gay or lesbian. You either are or you aren't. It's not about sex, it's about who you are. LGBT typically have tried for a portion of their life to behave heterosexually - to be "normal". That behavior didn't make them heterosexual, it made them actors.