It's certainly their right, but they're not very historically accurate. Hitler's NAZI party called themselves National Socialism but the rest of the world knew them as Fascists, as were the followers of Mussolini in Italy and Franco in Spain.
Fascism combines rabid nationalism and militarism with religion and has the support of big business. That's a much better description of today's republican party than Obama.
Dubya also had a couple of his immediate ancestors who were involved in illegally loaning money to Hitler's regime, so suspecting him of Fascist leanings had some basis.
By today's standards, Hitler would be a mainstream socialist.
And National Socialism = Communism...during his time...near enough the same, anyway.
You should preface your facts with, IMO.