There are some who say that Islam, Judaism and Christianity worship the same God, just because they read from the same Book, and use some of the same stories. This is false.
As religions, Jews and Muslims worship a false god. The true God is the God of the Church. If a person believes in God, then they accept Christ, and are in the Church,
but if they do not believe in God, then they reject Christ, and are not in the Church.
If a person says that they believe in God, but do not accept Christ, then they believe in a different god, or don't really believe at all.
In ministry and evangelism, I have found the similarities to be more of a hindrance than a help.