Adolf Hitler believed smoking was unhealthy. This was at a time when doctors generally encouraged it for health reasons. In other words, Hitler was right. And yet he was so horribly wrong about the other, more important things.
Other religions do sometimes get things right. They do contain wisdom and the benefit of centuries of human experiences and reflection. But if they offer salvation by any means other than an old rugged cross, they have got it so dreadfully wrong.
Let us respect members of other religions, while contending earnestly for the faith, once and for all delivered unto the saints.