You're citing ISIS. I suggest you some research to see who funded (and founded) ISIS and their ilk, and their predecessors for the matter, and for whose interests it is that they remain. Plus, even they don't use the word "infidel" in your link. They mix truth (e.g. western colonialism and rules that Islam dictates) with falsehood, to push their agenda. ISIS and their ilk have always attacked other Muslims. Plus, I don't see the word "infidel" there.
You're citing ISIS. I suggest you some research to see who funded (and founded) ISIS and their ilk, and their predecessors for the matter, and for whose interests it is that they remain. Plus, even they don't use the word "infidel" in your link. They mix truth (e.g. western colonialism and rules that Islam dictates) with falsehood, to push their agenda. ISIS and their ilk have always attacked other Muslims. Plus, I don't see the word "infidel" there.