Well I never supported Israel in the first place, but that didn't stop some 5000+ suicide bombers to detonate themselves in iraq over the past 13 years.
These people have an ideology, supporters, sympathizers and people who plan and help them carry out operations. As much as I wish it were true, but they are not a minority. Even before IS appeared majority of arabs were supporting other terrorist groups in Iraq such as tawhid and jihad, Alqaeda fi bilad alrafedain, dawlat al iraq alislamia, Jaish al islam, Jaish al Naqshabandia....etc. Right now the only reason why arabs are against IS is because IS is fighting other Sunni groups in Syria, even many Sunni scholars told IS to stick to "jihad" in Iraq. The other reason is because IS is threatening Arab kingdoms in the region, not because they care about Iraqis.
Anyways some more info about Diyala operations.
The operations showed IS vulnerability and weakness. IS usually retaliates to large scale attacks by opening other fronts in other areas, something they were unable to do in Diyala. Their collapse was relatively quick. They have lost too many men in the recent months and are unable to keep all their positions. In Nineveh they lost a few strategic areas to the peshmerga this week due to coalition airstrikes with peshmerga forces less than 12Km away from Mosul.
They are unable to drive with large convoys and instead have small forces scattered around, making it inevitable that they will loose ground. IS will eventually be forced to give up strategic areas in Kirkuk and sallahidden just to keep Mosul.
The coalition Air Force did not take any part in the Diyala operations.
