JWs are guilty of murder, causing higher rates of suicide, covering up child molestation, and keeping members in prisoned
You're confusing the followers with the leadership. True, many followers adhere to rules so closely that it has lead to bad situations, but it's not the rank and file that should be punished by banning. It's the leadership that should be held accountable for their policies and rules. And banning the religion as a whole will not be adequate. Instead, as many have already pointed out, it's better to put other restrictions on them. Don't allow them to own property. Levy taxes. Punish those in authority in cover ups of child abuse cases.
But leaving all that aside, whether it's JWs, Mormons, Worldwide Church of God, and yes, even Scientology, people should be allowed to choose the religion of their choice. It's a human rights issue, not a JW issue. Ban one religion, then others are sure to follow.
We're in a particular situation because we've been JWs, been on the inside, seen how it works. And we know it's all BS, and that some of their policies are harmful, maybe even deadly on occasion. Remove that intimacy with the religion from the equation, and it becomes a human rights issue that should concern all freedom loving people.