Levinas wrote an essay around 1933, "Hitlerism", in it he suggests that Marx's transformation of German Idealism was interpreted by these Fascists as the priority of the body over the soul, the priority of race/consanguity in the realization of a Utopian society. Achievement of Utopia required removal of all racial impurity,the Jews and other un-Aryan races.
Umberto Eco in his "Ur-Fascism" *describes growing up in Italy during Mussolini's rise and fall. He suggests that Fascism is kinda of an all-purpose term, you can take out or insert terms, but he does outline typical features:
1) A strict and narrow traditionalism, they are ultra-reactionary right.
2) Anti-modernism. They love armaments, all technological, but they think that the Enlightenment's humanity is the beginning of depravity.
3) Irratiionalism, action for actions sake, since it alone is beautiful. "Goering's alleged statement "When I hear talk of culture I reach for my gun"
4) There is no disagreement, that's treason.
5) "Ur-Fascism grows up and seeks for consensus by exploiting and exacerbating the natural fear of difference." It is by definition racist.
6) Fascism is derived from individual or social frustration.
7) In place of identity, Fascism inserts nationalism, common origin and its nationalism is defined by its enemies. It is all a plot against Fascism and the culprit must also lie within the common society. It's the Jews primarily, since being a Jew means that the person's origin is in some manner beyond all other national origins
8) Its enemies are strong, rich, powerful, and they are humiliated by this, yet by switch of rhetorical focus Fascism believes they will overcome their enemies might. [The short guy complex. (W. Riech)]
9)" For Ur-Fascism there is no struggle for life but, rather, life is lived for struggle. Thus
pacifism is trafficking with the enemy"
10) Fascism is ordered hierarchically, in military fashion, with one worthy leader.
11) " everybody is educated to become a hero"
12) "Since both permanent war and heroism are difficult games to play, the Ur-Fascist
transfers his will to power to sexual matters"
13) A citizen has no rights, no purpose only a role which is given to them.
14) "Newspeak", what is said is kept simple, no complex ideas are encouraged.
http://www.pegc.us/archive/Articles/eco_ur-fascism.pdf
It is a short and excellent read. Anyway, I think ISIS falls into several of these categories. Going back to Levinas, ISIS gives priority to the soul over the body, supplanting rationality with myth.