There are men who do kill their ex-wives, as they can’t handle THEIR wives not being THEIRS anymore. Those women have often sought help from society many times, but have been sent away with a “there, there, it can’t be that bad, he’s just showing that he loves you”, or just been ignored. The legal system ought to change, yes, to respect the fear of these women, and to protect them before it’s too late.
If you go into a marriage with a house you want to keep no matter what, then get a prenuptial agreement.
If you don’t want to pay alimony, either get sole custody of the child, or get a vasectomy before you start sleeping with women.
In Sweden, after a divorce, joint property is split into two. The one who has most custody usually keep the house, but compensate the other party for that. If you have 50⁄50 joint custody, neither pays alimony but share actual expenses fairly equal. In cases where a couple just live together, without being married, and then split up, property that has been acquired for their joint household is split up, but the things each person had before they got together is that person’s own property.
As Bastethotep pointed out, the important word is TESTED. One can also say: Two out of three men, who suspect that their child is not genetically theirs, are completely wrong.
Many men will say that their child is theirs because they love the child, s/he has been with them all his/her life, they have raised him/her, been there when s/he spoke the first word, took the first step, learned to read, ride a bike, do cartwheels. The genetics is of no importance, the person that is their child is everything. Fathers, who have adopted or became parents through assisted fertilization, love their children just as much, if not even more, than the average father. But then there is the group of men, the same as in my first paragraph, for whom OWNERSHIP is everything. THEIR wife, THEIR child, THEIR genes.