Assuming these people were actually planning this evil, they really should be sent to a firing squad.
I have absolutely no time for those who attack innocent civilians.
Honestly, I expected something like "Go, Team Sunni." You really surprised me positively. (No, I am not converting

)
I never support such stuff. These people are pure evil and must lose their perverted idea of battle.
The Australian police are, in my opinion, perfectly right to shoot them should they attempt this stupidity in Australia.
After all, that's what we do to extremists in Indonesia when they resist arrest.
I have no problem with that.
I, can't say how, knew of the impending death of a bunch of Indonesian extremists.
I had a choice of assisting murderers (people I'd got to know, although I didn't know exactly what they'd done until after a brief meeting) or helping to keep friends (Police) and family safe from such people.
No contest, I chose to keep silent, they died.
I would do exactly the same again, should such a situation arise.
Terrorists, in this case Muslim terrorists, are everyone's enemy, including the vast majority of Muslims.