My son is scaring me by saying every one should be afraid of him

[wannabeamomma]

Today my 29 yo son truly terrified me. He “forgave me” about a year ago for all of the abuse and neglect I supposedly imposed on him although all of my friends and family that knew him through childhood assure me that I was a good mother to him. And I know in my heart that I was a good mother to him.
Even though he “forgave me” he was no contact until recently because he needed help with his bills and for me to once again co sign on his apartment lease. Which I did because I am concerned about his ability to deal with his financial issues. He was doing well in his personal training business but apparently that is not going well probably because of his anger issues. He openly admits that he doesn’t care what anyone thinks anymore and is going to call out anyone he thinks has a problem.
He claims he has found God. He called about a month ago to tell me that he doesn’t want me to go to hell and that I need to read the Bible. The phone calls since then are about whether I am reading the Bible. I do and even sent him an extra application study bible I had.
Today he called to ask if I was reading the Bible. Then he told me that he is angry because I supposedly cared more about money than God. He is also angry that I supposedly didn’t live a life or focus his life on God.
Then he told me that everyone should be scared. I asked him who should be scared and why. He said everyone because if he wasn’t trying to follow God he would seek revenge and kill everyone who deserved it. He actually said he could have been a school shooter and he wants to kill everyone who has hurt him. I’m terrified that he will break and hurt someone. He hates his father so he would be the first target I think.
I told him that I he needs to stop judging and all the negative and hateful thoughts and to call me back when he was ready when he isn’t so angry. He texted right after and said he was sorry he is so angry. My husband his stepfather is so upset and I am lost. It breaks my heart because I know he is mentally unwell but I can’t fix him.

Our objective is to better understand the struggles our child faces and to learn the skills to improve our relationship and provide a supportive environment and also improve on our own emotional responses, attitudes and effectiveness as a family leaders