Which chancellor is most responsible for massive immigration into Germany? Adolf Hitler. His extreme incompetence and insane military goals have wrecked Germany's demographic potential by killing off a vast proportion of the male youth. In fact the Gastarbeiter Program was implemented in the mid 50s due to extreme labour shortages due to young gemans having been genocided in a scale not seen since the 30 year war. Also anti-racism, globalism and other jewish idologies were strengthened by the horror show that Nazism caused in Europe. Not to talk about the genocide of European Russia (how ironic that the most "racially nordic" areas of Russia were the ones most depopulated by the nazi invasion during the war, forever shifting the Russian genetic makeup towards the south and east).

Moreover, Nazism itself was a degenerate, massified political movement. Instead of preserving regional traditions, it erased them in favour of an artificial, anti-historical and anti-christian personality cult.

If we include the descendants of Eastern Aussiedler, the genetic makeup of Germany proper (especially western Germany) has changed unlike that of any other country in the last 80 years. This has created a nation of people cut off from their historic roots and alienated from their regional cultures. Modern Germany has been shaped by the catastrophic Nazi failure, and no subsequent chancellor has done nearly as much damage, by a long shot.