Toxic Parents

If parents hit someone with a wooden spatula, metal or even their hands, just because they are angry at them is that ok? Also is it ok for them to threaten to kill me? Is it ok if they allow their child to cut themselves and allow their children to be suicidal? Is it ok for him to hurt them physically and make them stand for 8 hours straight and hit them in front of other family members knowing that the child hates them doing so? Is it ok to use other things(pets) to threaten the child? Just asking for a friend..