Regarding the behaviour of my kid.

My husband has anger management issues and is under medication but often skips it and fights a lot both at home and outside and even beat me up often which my 1.5 year old kid witness every time. My in laws also fights very often over petty issues. And recently me and my husband had a big fight and hence separated temporarily and living with our parents. Kid was with his father and in laws for few days and back with me now. I have 2 queries. 1. As my in laws have anger management issues and quarrels most of the times and with my husband's mental issues, Is it safe to let the child be with them for some time ex. Day or two which they demand for. Both the child and my husband are attached to each other. But I am concerned about the things my son would pick up from my husband and the in laws. 2. After he was separated from me by my in laws for the few days, I could notice that my son throws, bites, beats and kicks all the time. Is it coz of phase in the child's growth or due to separation