Are all religions cults?

[possibletarian]

I've always though of a cult as 'none mainstream religious belief or thought' .

Then I think about what it means to be truly part of that religion, and in the case of christianity i think it's pretty well defined. I also think it has to be more than a passing nod to the beliefs it holds to be a member, and I expect a certain clearly seen adherence to it's rules and regulations (ie: actually going to church, or not re-marrying after divorce etc. and keeping the basic rules and beliefs of christianity)

As soon as i apply those rules it's clear to see that not many at all follow christianity in their practical everyday lives, in that respect it can be called a cult.