They are equating something they do not agree with to Nazism. That is why they posted a swastika. People are in turn labeling the person posting the tweet as th

They are equating something they do not agree with to Nazism. That is why they posted a swastika. People are in turn labeling the person posting the tweet as the Nazi because they seem to "act like a Nazi". The tactic they are using... in your own words is a Nazi tactic.