We don't need to sterilize people under 90 IQ. The real issue we need to focus on is creating a "system" or "structure" if you would call it that in which smarter/superior men were the men who would be the most likely to procreate without having to force the eugenics.

This can be accomplished by abolishing the entire welfare system including healthcare and subsequently lowering taxes then abolishing the civil rights act to allow discrimination. I would even go further and implementing a constitutional amendment that allows discrimination as a human right rather than the opposite of disallowing it so States can't make it illegal to discriminate. The reason for this is not to discriminate against the other races but rather to allow discrimination toward women. With the deportations you suggest (all non-Whites, most especially jews should be deported with the assets of jews expropriated), that would create an overall effect in society that was naturally eugenic without having to force it. The truth of the matter is not everyone deserves a high wage nor does everyone need to be intelligent in the society. You'll always get deviations from the mean and that's fine because we will still need below average peasants to work below average jobs.