Never, because 99% of Europeans are worthless subhumans who deserve everything that is happening to them.
The 1% left can't do it either, because then the police would crack down on them at full force, more so than on terrorists. Being a straight while male is the highest offense in yurop at the moment.
But let's be honest, knowing that Europe will be fully islamized in a few decades is somewhat a good thing : every single leftist/degenerate/SJW/feminist/tranny/fag/etc is going to be exterminated. 
And it's beautiful.