I am not familiar with Slipknot's music.  This is a heavy metal band, correct?
Yes they are. They all dress up in various clown masks. i have seen them twice live and their stage presence if like no other
Have they had any tours since 2019?
no they have not. I will be rearing to go soon as soon as they come back though. This album came out in 2004 and contains no explicits
What is Tortilla Man about?
I think he was the new guitarist after Jim Root passed away but can't remember exactly
I would assume that it is hard for a group to lose a member. Fans worked to try to identify this Tortilla Man.  I guess he wore a mask on stage?
I am sorry it was Paul Grey that passed away in 2010. Yes all of them wore masks on stage. They used to be harder but now they are pushing their 50s but they still sound great
I understand that the masks started out as a prank among band members.  I could see a bunch of guys thinking that kind of fooling around was funny.
All from Iowa just having some fun as lifelong friends. By the way, Volume 3 subliminal verses was nominated for Best Album in the 2004 Kerrang!
Have you seen the Clown Documentary?