No they are not. Additionally this is what their website says about their religion:
"Slipknot may be considered anti-Christian because of their prolifient use of these symbols, but they already admitted that the use of it are for entertainment and shock purposes only."
no
There's an official band Twitter: @slipknot
No members in Slipknot called 'Sean', Shaun Crahan/Clown isn't though.
Corey Taylor and Jim Root are in Slipknot and Stone Sour.
Limp Bizkit
none of the members of slipknot go to church.
Slipknot!
some are christians but 2 are satanic
No, mushroomhead has almost the same masks. And the members of Slipknot have different masks that reflect their personality.
no
There's an official band Twitter: @slipknot
america
No.
Extremely Heavy!
No members in Slipknot called 'Sean', Shaun Crahan/Clown isn't though.
Corey Taylor and Jim Root are in Slipknot and Stone Sour.
Limp Bizkit