As someone who has lived with my parents and their toxic relationship. I always get very ****ing anxious whenever there is an argument or when someone is angry. Uncivil arguing around Kids results in: - possible anxiety. - hates loud noises/yelling. - hates social interaction in fear of people being mad. - a lot of other problems. You can create a lot of negative energy that can rub off onto children, making them anxious or think that being toxic is normal. It normalises toxicity.