<human>: Like the title says, I think my uncle is in a cult. Basically, here's the story;

I posted a song on my Facebook wall earlier today by a Christian rock band. I am an atheist, unbeknownst to my family, but I still enjoy the music. He texted me shortly afterwards, telling me about how he had joined a religious group, and that God had told him in his sleep that his family would soon get closer to god, starting with me. Now, most of my family is Christian, but we're hardly religious at all (Never go to church, dont pray every day, dont hate atheists), but this particular uncle is a hardcore Christian.

Anyways, I asked him if this was because of my post, and he said yes. He told me that him and a few other people go to one person's house every Monday to pray and talk to God, and asked if I wanted to come to the next meeting. I jokingly asked if they spoke in tongues, and his exact reply was:
"Yes, but it's the old language of the bible, and we let God speak and move through us. We pray over each other, and get closer to God." at that point, I just thought, 'fine, whatever. Yea, it's weird, but he's not hurting anyone, and no one is hurting him.' his next text, however, is what tipped me off. He said that everyone had to pay "a mandatory $50 fee every session" to the leader. My uncle is on unemployment, and barely makes enough money to live as it is. I'm also worried for his kids, who he plans on bringing next Monday. He says that he plans to teach them to "harm the heathens and gays who don't accept Christ until they die or start believing." as an atheist, this alarmed me as well. This cult he's been suckered into is sucking him dry and teaching his kids hatred and intolerance, and I'm frankly very saddened by this. I love my uncle, and I'm great friends with his son/my cousin. What should I do?

Can you condense the text into three sentences or less?
<bot>: My uncle had been suckered into a cult that takes away what little money he has, and teaches his kids hatred and intolerance. Wat do?