The Volga Germans were limited in number, knew the deal and had vital skills which were being transferred to Russia. Unfettered mass immigration would be tantamount to national and cultural suicide for any ethnic state and the Church would never allow it.
Not his biggest mistake, but a biggish one was to allow himself to be baited into acts of military idiocy. The RAF was being bombed out of existence until the British baited Hitler with the RAF terror bombing of Mönchengladbach, prompting a Fuhrer-tantrum and the redirection of the Luftwaffe...
It doesn't matter who runs China. Tibet is the source of their water, as well as India's. It is such a strategic necessity to control the continental water resources that any competent Chinese government must take and hold Tibet. It has nothing whatsoever to do with the people involved or even...