Please visit a Mennonite church.
Debate is useless. Only direct experience will change your mind. I can post all day here about the importance of religion, and no one will get it. But if you see the impact of religion for yourself, you will understand.
These are the steps I recommend for visiting a conservative Mennonite church. First read An Introduction to Old Order and Conservative Mennonite Groups. This will give you a general overview of the Mennonites. Then use the Church Finder to find a church near you. I recommend Eastern Pennsylvania Mennonite Churches and the Nationwide Fellowship Churches since I have visited these and can vouch for them. After church, you will be invited to have lunch with one of the Mennonite families. There you can ask questions and learn about the Mennonites. Here is a preview of what you can expect in their .