ISIS blended in with the refugees to infiltrate into Europe.
It wouldn't be impossible but to carry out an attack on an Iranian city, ISIS members will have to pass through hostile Kurdish and Shia areas.
Kurdish, Baloch and occasionally Arab separatists attack targets in Iran on a monthly basis. It is just underreported by the media. If ISIS really wanted to attack Iran they could likely do it but I do not believe that they want to open another front and their priority is to cause havoc in the Arab world. Same goes for Israel by the way. You can clearly see that by watching their propaganda videos. Their main focus, in terms of Arab regimes, is actually the House of Saud. Other than the Syrian and Iraqi regimes.
However ISIS will only lose strength from now on. The best they can hope for is attacks like the recent one in Baghdad (working underground without controlling any land continuously) like they did in 2012 when the "surge" started. Largely thanks to the Al-Maliki regime and other factors.
Once Iraq defeats ISIS on the ground and improves security (a good step was the removal of those fake bomb doctors that the police has been using for well over 1 decade - absolutely madness) they will only do sporadic hit and run attacks until they die out in a few years time. Anyway Iraq's security and future is connected to Syria next door so I am talking from a perspective where Syria becomes stable or 1 party prevails. Although Syria are worse of and they might experience what Iraq has been experiencing since 2003.
ISIS only operates in failed countries (see Libya and Yemen).
Anyway you can see by the number of recruits by ISIS. They are struggling. So all those doomsday predications for the region are way off IMO.
I would be more worried about other regions of the Muslim world (Nigeria, Afghanistan etc.) on the long run.
That's totally wrong, the first innovator who came up with the idea of blowing himself up was a Shia guy. He blew himself up in the 80s in front of an Iraqi ministry. Aldawa party, which is the party of Noori Almalki, was behind that deadly suicide bombing.
Hezbollah but anyway it is the same thing in this regard.
why Life in Prison? Does this man deserve to be let loose? Please saudi arabia do justice with yourself and to the whole world and chop the heads of these dogs of hell. Please show no mercy to them.
Because he has not killed anyone. Although I would have nothing against him being executed as he is a waste of space but even such people serve a purpose which Dawood's program showed.