Actually, no it isn’t, because the doctrine and histories and teachings of LDS support these groups.
Do you think the bible supports the fact that God hates homosexuals? (Hint: Yes, it does.) Yet you won't see Baptists going about protesting that everywhere like Phelps and his 'Baptist' crew do.
I'm also not aware of the teaching in the LDS doctrines and covenants and other official documents that call for kicking teenaged boys out of the community. Can you please point that out?