Likelihood parents quarrels be in adult world is very normal and common thing, can understand, but to the child character, they can feel " father mother this is how " , even parents makes a noise so that father to move a hand to still can be frightened mainly to cry the child, this kind of behavior of parents lets safe feeling of the child get very big impact.
And the child, grow in such domestic environment, be influenced by what one constantly sees and hears also was caught like to use violent, grumpy, resemble father and mother that kind.
The healthy growing need of a child has favorable environment, parents is taught correctly, undesirable surroundings can cause psychological scar to the child only, and some scar are lifelong cicatrization hard.
