Should I leave my cancer husband?

Hi I am married to an mentally and physically emotionally abusive husband. And I have tried several times to leave him but he use the people and my religious belief against me making it hard to leave but after the last time I was done after he hit me and pushed me down and had bruises all over me I left for good.

So I was staying with my mom he crying to her he sorry has nobody and side note this dud said all his family was dead 💀 gone right but he would change the story everytime he told it but I was young and dumb still loved didn’t care about his past right. Well he get my mom to let him stay and we go to talk and eat at this pizza street and get sick. This where it gets twisted I got diagnosed with ulcers colitis and mind u we are in the hospital together I get released before him so I go to the room they gave woundering what he was still there doing test as ask for the room the nurse are crying tell me there so sorry I think did he past no but just as bad has stage 4 Colon cancer will live five years or less. So we end up back together to help each but it hasn’t changed that is still mentally abuse even though he can’t be physically cause he’s sick and he has stopped cemo and want to just live the five years out.

So should let him keep mentally abusing me and my kid who has had enough as well there my oldest is no ready to put hands on him like he did him as revenge now he’s weak but still see as dad so it hard we don’t know what to do like we are just waiting for him to die but believe none of us will shed one tear so what do u think am I being heartless are stupid? And be truthful I can take it. And sorry for the long read.