Christians are not to tolerate sin in their own lives. Jesus, said if your eye causes you to sin you should pluck it out. How tolerant is that? Presbyterians are presbyterians because they bleieve to be called to follow christ. Why condone leadership to act against the teachings of Christ, openly and proudly? It's hypocritical and insane.
If the leaderership of any faith acts against the tenants of the faith, why elevate them? How is that tolerance?
If homosexuality is sinful, and many believe that scripture is clear that it is, how is it tolerant to condone it?