Many religious people are hypocrites. What is a hypocrite? It is someone whose life is a Hollywood performance. They are an actor, a pretender and not the genuine article. A polite term that is sometimes used for such a fraud is a nominal Christian, someone who is a Christian in name only. If we claim to be Christians yet allowed the Gospel message to make only a surface change in our lives, then we fail to enter the kingdom of heaven.
A tendency of human nature is to persuade others to be just like us. So, if we have failed to enter in, then we certainly don't want our friends to get too "religious" on us either. Dangerously, just like Jesus warned the Pharisees in Matthew 23:13, when we play the hypocrite, we lock people out of the kingdom of heaven. We do not go in ourselves, and when others are going in, we stop them. That's what Jesus said.