It all started with Bobby Henderson
open letter to Kansas School Board in which he claimed that the whole universe is created by a flying monster and there is enough proof of this. Bobby through that letter also demanded that Pastafarians may also be taught in schools.
They also have a forum where one learn more about this philosophy and ask Questions.
https://forum.spaghettimonster.org/Are these Pastafarians anti-religion and/or atheists or this is a religion in which they believe?
No that's not true. They are not anti religion nor are they atheist. They have there own theory about the God which is quite different from popular religions like Christianity , Islam. According to them they are not anti-religion, but are anti-crazy nonsense that is done in the name of religion. That's the difference.