Behaviors aren't protected in the Constitution outside religion. Has the cult of LGBT gotten tax exempt status, declaring themselves as a religion? No? Then there is no protection. Even if there was, no religion can force others to practice it. A Christian couldn't force a member of the Church of LGBT to print giant highway billboards that read "Homosexuality is an abomination before God", for instance...

A Muslim can't force a jew to advertise for "Pork, the other white meat". A Mormon can't force a Muslim to print a picture of a cartoon of Muhammed.
Bullroar. Speech is a behavior.
Yes, akin to freedom of association, or to not associate. Good, you're learning....and your cult is going to lose this round, so prepare for that mentally ahead of time...