Husband banned my mom from our home

Me and my hubby have 3 kids. One together. One from my previous relationship and one from his. However my step son passed away 3 years ago when he was 12. My son is 12 now and he's been acting out horribly. He's been getting mad. Throwing desk at teachers. It's been awful. I am getting him into therapy. Just trying to see what our copay will be. My mom keeps saying my son just needs deliverance which is a religious thing. No I think he needs therapy. Possibly medication but we will see when we get there. My mom came to see us and said she wanted to help my son and begged me to at least let this priest she knows come to the house. I said fine whatever without asking my husband. I didn't think he would mind and he may have not minded had that not done what they did. I honestly just wanted her off my back and prove this isn't a demon thing. It's a behavioral thing. My husband was confused and the priest brought this lady like it's the fucking conjuring. She goes "I sense you have had a child that passed away." Would be impressive if we didn't have a little alter with his ashes and pictures of him around it just out in the open. My husband is very sensitive when it comes to talking about my step son and said to leave whatever weird thing we are doing leave his kid out of it. They asked my husband was my step son baptized. He said no because my husband and his ex wife are actually Jewish. My husband isn't very religious but his son was still gonna get a bar mitzvah and passed away like a month before his birthday. So these people my brought over said that what is happening is my step son is trying to climb out of hell and has attached himself to MY son. Seemed to be heading down the path of "Your son needs an exorcism" but my husband grabbed him and threw him out our home. And the lady. And my mom. My husband got really emotional and said they're so fucked up for that. Then he got upset at me for letting my mom bring them here anyway and I didn't know that was going to happen. Now I feel bad. My husband is very upset and emotional. My son is scared now and my mom tried to begged me to let them come back because they were on to something. My husband says he's setting a boundary. My mom can never come over again. I find that harsh. Because she is my mom and I love her but I always want to be understanding of his feelings.

@Mommaof4 I had an idea of what that was and I just wanted to get my mom off my back. I should have asked my husband and I do not think he would have been as angry had they not brought my step son into it. I had no way of predicting they would do something like that. Also my son is biologically my son's. He is not the child we have together. The whole reason he is upset is his dead son got brought into it