Jainism

[JuliaL]

This is probably the best religion you can follow the more extremists you are the most peaceful you are.

Jainism - is a religion of non violence. It promotes peace of the world. But more importantly, it promotes, peace within the self. It's the path that emphasizes to search for truth. It's logical and asks us to be logical. Nothing should be believed on blindly.
It's about self discipline and training. A path to achieve the true happiness which cannot be found in this material world.
It itself says that no religion should be tagged a the 'best'. And that a person needn't follow a religion to be a good person.
This is the oldest living religion. It's a spiritual path. No god is there who created us and we ourselves are responsible for better or good.

I got to hang out for a couple weeks on a Mennonite colony farming wheat in Alberta. These folks were pretty radically pacifist. They'd gotten driven out of Europe & settled in New York (I think I remember, this was 30 years ago) then driven out of there & settled in Illinois, then driven out of there and settled in Alberta.
If your religion is too peaceful, it gets replaced by ones that aren't. The thought is nice, but in practice, it has no defense.
https://en.wikipedia.org/wiki/Jainism#Royal_patronage

Once a major religion, Jainism declined due to a number of factors, including proselytising by other religious groups, persecution, withdrawal of royal patronage, sectarian fragmentation and the absence of central leadership