Over the last 500 years many religions have managed to greatly tone down that aspect (torture, murder, excommunication, shunning, ostracism).
Would it be cynical to suggest that self-preservation may be the reason? Or are humans gradually beginning to see the light?
Some, like myself, maintain that the elements of human control, human authority and human ideology are found throughout the spectrum that starts with cults (such as the Watchtower) and ends with more "benign" religious groups or clubs such as progressive Baptists, progressive Anglicans, and progressive Catholics.
The New Testament (known as the Injeel/Injil to Muslims) however does not support middlemen, hierarchies and organisations between God and man (1 Tim 2:5; John 14:6).
The gospel/bissar/injeel/injil is a map designed to lead us away from dependence on human control, authority and ideology, to dependence on God in a vibrant, transformative, empowering, healing and engaging personal relationship.
This personal relationship is available to anyone willing to accept adoption into God's faily as a "free gift" legally secured by an exhorbitant ransom price paid by our heavenly father to our evil step-father (in the greatest legal custody battle ever).
Galatians 4 in the Message Bible explains why the "ruling religious clergy class" have a serious problem with their followers discovering and following this map: "They want to shut you out of the free world of God's grace so that you will always depend on them for approval and direction, making them feel important [and relevant]".