Could this be what sends it over the cliff?

We already have a population being overly burdened by a flood of Muslim immigrants, there was already a great deal of anger and distrust across Europe towards these migrants and towards the leaders who have let them into the continent with very little vetting.

Now we have these horrific, evil attacks in Paris. We don't know how many dead, the attacks are still going on, but we know its bad, very bad.

The citizens of Europe will not bear this any more. There could be very dark times ahead for the continent and the world.

Shouldn't we Americans be more concerned about our Mexico" problem?

I don't think this will change much. However I think there will be a lot more liberty/privacy eroding "anti-terrorism" laws introduced as a result.

Maybe it wont, but if its not this one it will be another. There is too much discontent in Europe due to the migration crisis for it not to boil over at some point. I'm afraid a Franz Ferdinand moment has arrived or is coming.