Will a five month old male kitten hurt 5 week old kittens?

Kittens taken away from their mother early tend to get attached to the human caring for them and will develop behaviours such as kneading, meowing for attention and inability to be left alone. They will lack good toilet manners and will not thrive well as they are no longer feeding off of mum. They tend to get sick easily from weak immune system (mothers milk helps to strengthen this usually). Hunting skills will be poor.