Fortnite is taking my child from me... PLEASE HELP

I'm a dedicated Christian, and judging by what I've seen on television, Fortnite is a game full of violence, slavery and abuse. Forcing creatures to fight for their own entertainment is appalling and I cannot believe it's rated for child
ren. I can also not believe it has been going on for years, causing evil to spread.
Yesterday, my son asked what I was fearing. He asked for a Fortnite membership, I was shocked, because I knew my sister let her sons play that dreadful game, and my sister is dim and does not follow in Gods footsteps.
I told him no and immediately sent him to his room. I then phoned my pastor and he recommended steering my son away from that awful game. My son is 11 years old and he has become very cold with me ever since I said no. He called me insane, which is a reflect of what the game can do to a child.
I will not allow any kind of things in my house that are in any way offending God. I threw away all my sons Harry Potter books and forbidden him from watching the movies.
I am a good mother, and any parent who lets their kids play Fortnite, will grow up with a power obsessed, violent child worshiping Satan. Evolution is also in the game, which is against Gods words. it is disgraceful and should be banned.
My son has insulted me ever since this has happened. He told me his friends play Fortnite so I have told him he is not allowed near them again. It is causing a drift between our family. I have told my son various times that he will go to Hell if he plays Fortnite but the message is not sinking in.

I fear Satan is taking him from me