Hitler told uninformed "homelanders" that mother Germany had been infiltrated by people who didn't respect it's borders, language, culture, tradition, and laws.
In Germany's case it wasn't true. German Jews were citizens.
Of course.
But American Liberals are also citizens, yet they are treated as anti-American "outsiders" who don't have a right to power, even when that power is legally and constitutionally certified through an election. Obama is not seen as legitimate by many in your party. The whole Birther Movement, in so far as it was/is used as a tool to obstruct him, actually shreds the Constitutional Rights of those who voted for him.
But here is my point. Liberals in congress, hollywood and the news media are not seen as Real Americans. They are seen as anti-American or un-American. This means you don't have to share power with them, and it's why you want a one-party Republican or rightwing state.
Hitler and the US-Republican Party believe/believed that there was/is one true Germany/USA. This kind of thinking is at home in both religious and Fascists systems. These system hold that there is one fixed set of values that every human must live by. There is no such thing as individual choice or a plurality of visions to be respected by a minimalist state - a state not based on the imposition of values but a sphere of non-interference so that each individual can choose and act upon their own values. For instance, I may love this nation for the New Deal, Roe v Wade and the Civil Rights Act, but you might love it for the Iraq War and Ronald Reagan. In your world, my America doesn't exist. To you, I am an outsider. Calling me an outsider or an anti-American makes it easy for you to obstruct the candidates I send to Washington therefore denying my Constitutionally Protected right to vote).
Since, as you claim, we Liberals are anti-Americans who are bent on destroying
your country, you don't have to allow the president we voted for the right to pick a Supreme Court nominee because he's not a Real American, nor are his voters. This is a very old strategy. When tyrannical movements take power, they start by saying that only people in their movement have a right to exercise power. Everyone else, they tell us, is not a Real Citizen. [This means that when Reagan or Bush violate the Constitution, it is ignored or never reported]
It all starts with revanchism - the belief that there is one true set of citizens whose nation has been stolen by people who don't share their values, the one true set of values. FYI: this is a common political technique used by despotic movements to avoid having to submit policy disputes to public discussion. The goal is to de-legitimize the other side
before they open their mouth, and to obstruct them to death if their politicians sneak by your gerrymander.
Hitler singled out the Jews because they were different than traditional Germans, just as Liberals are different than traditional conservatives. The fact that each "outsider" group are citizens is besides the point. They've stolen the country and they're destroying it. They must be stopped.
[Again, this is what despotic regimes do. They refuse to share power with people outside their movement, who they claim are not real citizens of the home nation, even if they have the legal status of citizens.]
When it comes to Legal Citizens, there are not Real Americans vs Anti-Americans. There are merely policy differences, and they are settled through the Democratic machinery of electing representatives. By calling liberal voters and politicians un-American, you are merely laying the foundation to obstruct their Constitutional rights to exercise power and share in the shaping of this nation.