Daesh are basically the same people with the same goals as the other Islamic fundamentalist movements you are familiar with. Read the history: https://en.wikipedia.org/wiki/Islamic_State_of_Iraq_and_the_...
In some ways the person I was responding to was right because, between Osama and al Zarqawi, Osama was definitely the moderate. But you're talking about wanting to kill everyone who isn't a muslim vs. everyone who isn't sunni muslim.
The idea that ISIS is something fundamentally different is driven by the media. It's sort of how DARE tries to scare parents by saying "This generation is smoking some really crazy stuff you're not familiar with!"
Edit: here, this may be a link that helps you understand more of the history of the region as well as the context for the rise of AQ/ISIL: https://en.wikipedia.org/wiki/Maktab_al-Khidamat