Yep, he’s a disaster waiting to happen with the rise of ISIS.
I can't remember the name of that Qatari or was it Saudi Sheikh, who actually gave an interview as to why his forces, funded by the Saudis, Qataris, etc.. were fighting alongside IS. From memory, that Sheikh said his Islamist group weren't as brutal as IS, but still they've been fighting alongside IS to bring down the Iraqi central government (united goal for now). So, I'm not sure if Erdogan (having strong Islamist inclination) hasn't already given moral support (if financial) to IS.