We don't have enough evidence to say one way or the other. But again, why should the child pay for his father's crime with his own life? If the woman does not want a child that resulted from rape, she can give him up for adoption.
Further, from our days as stone age tribesmen all the way into the late Medieval era, it was quite common for white men to acquire brides via kidnapping or conquest. It's part of our heritage. Rape is much the same, but in this instance it is unacceptable because the woman in question does not belong to the man impregnating her. So while rape must be outlawed and punished, by modern definitions of rape, most of us wouldn't exist if numerous ancestors of ours hadn't stolen a bride from a rival tribe or taking a wife from the people they conquered.
Ask someone who didn't have a father growing up whether or not he'd be better off HAVING NEVER LIVED AT ALL.
Again, children can be adopted out or raised by the state, rather than exterminated. There's no need to waste good genes and another white that could add to our population.
This is a nice idea, but the logical end result would be the entire country being turned into the suburbs, with no vast stretches of wilderness/nature and no concentrations of industry. Any industry, such as shipping, factories, etc. needs the population base to support it, and any population needs the infrastructure (not just roads, utilities, etc., but infrastructure such as groceries, clothing stores, entertainment, etc.) to support it. Hence, cities.
Cities will never be eliminated, but we can fix some of what's wrong with them by replacing apartment blocks with neighborhoods of houses, spreading things out so that people can walk/bike/ride the bus/train everywhere they need to go, and putting parks, gardens, and other nature areas everywhere rather than just concrete and glass as far as the eye can see. Having clusters of homes and businesses where everyone get where they need to without driving for 30 minutes to an hour both ways would be greatly beneficial, but what if you live in Area A, but can't find a job except in Area B? Public transit will only go so far; we can't eliminate the car entirely, but we can alleviate the problem by quite a bit.
It's definitely something we should be discussing and working on.
Arabs also marry their first cousins, in every generation, over centuries. Maybe the problem has more to do with inbreeding than having a minority of your population marry multiple wives.
You assume homes would be expensive in an economy without Jews. Homes didn't become prohibitively expensive until the mid-20th century. And, again, the idea is less to have people pay back loans than it is to provide them with a house suitable for a family and then encourage them to immediately start that family.
It's worked in numerous countries, not just Nazi Germany, and it was a rousing success for the Nazis.
Congratulations, Herr Oberschutze; your sharp eye and keen wits have earned you a promotion to Sturmmann. Keep up the good work.