I don't think people will stop consuming meat if you ask them nicely. You have to make decisions that will hurt the meat industry and make it infeasible. This would likely best be achieved through slowly dropping tax incentives, and transferring them over to alternatives so that people have something equally economical to today's meat.
What gives you the right to control what people eat?
You can't legally eat the meat of other humans in most (all? not sure) countries. You're not allowed to buy the meat of certain animals in certain countries, due to cultural norms (dogs) or due to protection of certain species.
It's an absolutely normal thing that laws regulate or forbid things that have negative effects on society.