And now you're accusing them of being Nazi's. But THEY know they're not Nazis (well those of them that aren't nazis think they're not nazis). So who are you trying to convince? Yourselves? Now they're worried because people are lying about them and what they want and then they'll just donate to the astroturfing organization that's protecting them from the unhinged lunatics accusing them of being nazis.
You need to fight on both fronts, you have to use a charitable approach to slow down grass roots recruiting. AND you attack the values and falsehoods behind the hidden agenda.
They have their public claims and they have their behind closed doors claims. You combat their public claims directly and proactively promote the counterarguments to their behind closed doors claims.
You also indict them for ACTUAL poor behavior that they've done.
This is the best source I could find for the original context for the Hitler quote. Sticking strictly to the context of that image, it's classic: Hitler did this thing that the government is doing, that's why we have to fight against it.
I don't have the actual original before the yellow box was added, so I can't say if the yellow box was the only change. But now all you're doing by attacking them on this nothingburger of a Hitler quote, is you've given them ammunition to talk about how irrational and unreasonable the people opposing them are.
The accusation of ambitions similar to that of Hitler could be true, but your evidence doesn't support it at all. All you're doing is whipping up your side to an irrational fervor which will get noticed by the other side and then they'll do the same thing.
You're making things worse, not better.
I don't know. That's how I do advocacy, maybe it's ineffective. I think it works on the people where something can work and doesn't work on the people where nothing worse. This more unhinged kinda of advocacy is pushing away the people on whom it can work, helps turn the people on your side into lunatics and helps to turn people on the other side into even worse lunatics.