Otto von Bismarck (a 19th century German politician) is viewed more correctly as the individual most responsible for the development of German social security, disability insurance and medical insurance (for the broad masses).
Lots of the things that run counter to Conservative thought and interest occurred in Germany long before Hitler. If you want to use those things in a debate as examples of inappropriate government intrusion into what should be private activity that's OK, but you can't credit Hitler with every darned thing.
If you want to find the roots of modern government financial misbehavior you might well look to Abraham Lincoln and the Credit Moblier! There you are, a former railroad lawyer is now President and what is he doing? Well, he's shoveling government money to guys who build railroads. Johnson and then Grant followed up on that.
I agree that the characteristics of Nazi Germany began much before Hitler. Many do go back to Bismarck, father of the modern social welfare state.
But the comparison of the modern US to Nazi Germany is no less valid because of that. The history of the governmental changes just shows how easy it is to slip from “benign” social welfare statism to totalitarianism.
Put another way, how easy it is to turn the heat on to “boil” once you have the frogs used to warm water.