Doing something democratically doesn’t make it right or fair. No matter how much you care about animal rights, you have no right to force other people to do the same. The fact that you disagree with them doesn’t make them wrong.  We generally accept that the state may control what people do in order to protect society. This proposed ban goes beyond that remit, as religious slaughter of animals does not cause harm to other people. That being the case, it is unjust to stop them.