I don't think there are good and bad religions. It's just the "people" who shape the religion either good or bad.
Don't forget Jesus said to the rich man, "Why did you call me teacher? No one is GOOD except my father in heaven." For those who followed me and had bear good fruits.
1 John 4:1-6
Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
2 Corinthians 11:13-15
For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.
2 Timothy 4:3
For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears (sound too good to hear)
Matthew 7:15-16
Beware of false prophets, who come to you in sheep's clothing but inwardly are ravenous wolves. You will recognize them by their fruits. Are grapes gathered from thornbushes, or figs from thistles?