why husbands kill their wives and children

have you ever wondered why men do the things they do. i have and there are things i wish i never knew. For insteant men will kill there families if they feel like they cant protect them or if they cant provide for them. a nother reason why is if the husbands are cheating on their wives and the other lady becomes pregnant and he decides to stay with her and instead of paying child support or alamony then they think its the only was, the sad thing about it is its not only men doing it women will also do the same thing.