Could God Have Stopped the Paris Attacks?

Theologian and philosopher, Thomas Jay Oord, says, no.  Excerpt:

Too few believers will go so far as to ask this question: “Could God have stopped the Paris attacks?”

Perhaps many believers will not ask this question, because the answer they have been told is not comforting. Most theologians in the past and present, after all, would say God allowed the Paris tragedies and other terrorist attacks. They believe God has the kind of power to prevent this unnecessary death and suffering. But according to most theologians, God permitted this pointless pain in Paris and elsewhere.

I disagree.  A few theologians will say it is logically impossible for God to both give free will and not give free will. So in choosing to give free will to the ISIS terrorists, God was self-constrained.

"With God All Things Are Possible." Is that true?

Matthew 19:25-26 reads:

When the disciples heard this, they were greatly astonished and asked, "Who then can be saved?"Jesus looked at them and said, "With man this is impossible, but with God all things are possible."

What does "all things" refer to?  All actual things?  All possible things?  All impossible things?  Some take this verse to entail that God can do anything logically impossible.  God is such that he could have made it the case that he never existed.  For to make it the case that one never existed is to be such that one can both exist and do something such that one has never existed which would be to do the logically impossible.  God could make a square circle. He could make a perfect triangle the sum of the interior angels being zero degrees and fluffy.  Moreover, God could make it the case that he's always been a square circle and never been a square circle.  I fail to find such a view coherent.

To someone who holds such a view, I ask, "Has God done such a thing? Has God made it the case that he's an evil square circle?"

Answer: "No, for that's not in the Bible."

Could God Make a Cadillac So Shiny That He Could See His Own Invisible Attributes In It?

The answer may not seem obvious.  It is about as obvious as whether God is powerful enough such that He could turn himself into a billiard ball.
I asked the latter question in class yesterday.  I'll take a stab at answering it and leave it to the reader to answer the former question.