Well it may be harmless bigotry to hold the view that not all sexualities deserve equal rights if you don't intend to shove that bigoted viewpoint down someone's throat, but it's still bigotry. Just as believing that black people don't deserve equal rights but never telling anyone about it ever for fear of being called racist may be harmless if such racism is kept entirely in the confines of one's own mind and not expressed to everyone ever, but it's still racism. And pedophilia that isn't acted on may indeed not be child molestation, but it's still pedophilia.
If someone has the 'perspective' that homosexuals don't deserve equal rights, that perspective is bigoted, period.
If someone has the 'perspective' that homosexuals don't deserve equal rights, that perspective is bigoted, period.