Belief in eventual total justice lessens the motivation to achieve justice now. Church pacifies peoples need to feel they are doing good things. It is a way to avoid the difficulty of actually doing good. Voting and recycling, worrying about individual species extinction etc. serve the same purpose. I do not believe it is so hard to see the moral path.
Church makes it seem complex.
The worship of marry is a reversion to a multi-god system. Christianity is idolatry. God is a verb, not a noun. Belief in freewill makes people think guilt and punishment are justified. Opposition to birth control is a major cause of suffering.