Posting this image (for which you give neither a URL for its source nor a date and place for where the image was captured, but which I believe you have posted elsewhere in this thread) is an example of two logical fallacies.
The first is the rhetorical fallacy of “argument by repetition” in which a person states the same point over and over again, eventually wearing the other person down to the point where they no longer want to continue the argument.
The second is the fallacy of "proof by assertion," which is sometimes also known as "proof by repeated assertion," and which is an informal fallacy in which a proposition is repeatedly restated regardless of contradiction and refutation.
The proposition can sometimes be repeated until any challenges or opposition cease, letting the proponent assert it as fact, and solely due to a lack of challengers - which is known as "argumentum ad nauseam" (
https://rationalwiki.org/wiki/Argumentum_ad_nauseam). Repetition of such claims may be cited as evidence of its truth, in a variant of the appeal to authority or appeal to belief fallacies.
There are on the Internet numerous images of the front page of tabloid newspapers that show Prince Harry wearing a Nazi uniform, complete with swastika armband. As far as I know, no-one seriously believes he is a Nazi - though the case for his so being could be argued by the logical fallacies identified above.