In my view, any of the religions teach mankind to be good. Does that mean that no matter which religion mankind follows, as long as they are sincere and commit no evil deeds they will achieve salvation?

　　

　　The Answer from God’s Word:

　　He who is incapable of creating the world will be incapable of bringing it to an end, whereas He who created the world will surely bring it to an end, and so if one is unable to bring the age to an end and is merely able to help man cultivate his mind, then he will surely not be God, and will surely not be the Lord of mankind. He will be incapable of doing such great work; there is only one who can carry out such work, and all that are unable to do this work are surely the enemies other than God. If they are cults, then they are incompatible with God, and if they are incompatible with God, then they are the enemies of God. All work is done by this one true God, and the entire universe is commanded by this one God.

from “Knowing the Three Stages of God’s Work Is the Path to Knowing God” in The Word Appears in the Flesh