Effects of a 1919 Anschluss on NSDAP performance in Weimar electoral politics

[America Needs a 13-6 Progressive SCOTUS]

Looking at these maps, it would definitely appear that the Nazis had a political weak spot stretching along the distance from the Belgian to the Austrian border.
Potentially, it seems that the Protestant/Catholic border explained the substantial difference in the Nazis performance.
If that was the case, then it would be an inevitable conclusion that a 1919 Anschluss would have been bad for the Nazis politically since the Nazis would be expected to perform worse in Anschluss territory than they performed elsewhere.
In addition, the Nazis and other right wing Weimar political parties had sometimes made a political point that the Treaties of Versailles/Trianon singled out Austria as an area that could not be included in the the ethnic state that "it belonged within", helping them rally support.
A 1919 Anschluss would have blocked the Nazis from making this type of argument, potentially weakening their support even more across all of Germany and Austria.
Honestly, after thinking about this for a while, I have come to the conclusion that a 1919 Anschluss, had it been the policy of the West to require it instead of to block it would have weakened the Nazis just enough to prevent them from ever actually managing to take power, preventing World War 2 as it occurred, the Holocaust, and the fall of Weimar Democracy from happening in the process.