Like, a deadset ISIL supporter? Fuck yeah it is. Some shouty wanker with a Quran and a lack of focus on certain bits of it? Nope.
In terms of advocating for genocide and then carrying out that genocide, Daesh-holes are a really good example of the sort of people who frankly, need punching and have a huge amount in common with Nazis. The main difference between those assholes and Nazi assholes is that one would be investigated and jailed before they even got to do their equivalent of Heiling and Hittling down the street.