Earlier quoted context omitted.
Saying that ISIS isn't a terrorist organization doesn't mean that user is defending the organization. Terrorist has become a catch-all term that is used way too broadly (seems to cover any armed force motivated by Islam for many people). ISIS can be an awful organization without consisting of terrorists.
They are terrorizing local populations for a political goal. They are not just fighting battles they are slaughtering civilians into compliance. How is that not terrorism? Edit: He also claimed that it would be better if ISIS was in charge of the area. That is quite ridiculous.
I think in order to be a terrorist, terror has to be your main political tool.