Why would a 10 year old act like this?!

He or she is obviously suffering from some kind of trauma. Their future suicide planning my be linked to their father's death, they may have some idea in their head that they have to do the same.
As for the worshiping of the devil, you may need to seek some professional help. Something like that isn't healthy and they may be suffering from a mental illness of some sort. You should see a psychiatrist about that and get it checked. Obviously, it's not a very normal thing, so professional help is definitely needed.

Hmm, well yes, it could be a reason. It could also be that he/she doesnt have any trust in his/her life, and think that he/she wont succeed in life, but he/she is too young to think like this, its very strange though! You should have a long and comfortable talk with this person, thats actually the best thing you can do, other than getting some phychologist to talk with the person. A kid shouldnt be thinking like this, i think he/she is deeply hurt inside, you should talk immediatly!! This is not a good sign :S

Male or Female is a big factor in this, but even so, I do believe they are tormented inside with the fact that their father died in that way, and maybe they just miss that person, or feel aweful that they aren't with them anymore, or even want to just be like them. Maybe this child has issues where other people at school or places make fun of him or her, and they feel that there is no God, and that the devil runs their life. Personally I would seek medical attention from a therapist immeadiatly

There are many reasons a 10 yr old would do these things. Chemical and hormonal imbalances, unresolved issues, etc. I suggest a complete physical exam with labs and a consult for therapy. Physical and chemical imbalances need to be ruled out. Then counseling may help to figure out what other issues are causing these thoughts.

former R.N. with experience in many fields including psychology.

If a 10 year old exhibits this type of behavior, the child has been exposed to this type of behavior. This could have been on TV or in person.

the child needs to be taken to the Dr's without delay

there past may be a part of why they are feeling like they are but they do need help asap


best wishes

They need to be taken to a doctor immediately.

get him help. fast