I would not want to go. As much as I fear that humanity and earth are doomed Earth is still my home. Also I may die long before extinction of humanity. That would be preferable.

Putting aside that twenty years away I would be closing in on seventy, as well as all the health issues that would rule me out,

I may be mistaken(from what I remember nazis were all about creating a a pure race) but weren't they also not fond of old and sick people as well? Well maybe this is not coincidence...