It is time for the EU to take a stance, Turkey and its supporters are no allies.
That's really bad idea. Turkey is in really delicate situation right now. AKP has crippled the army after the coup attempt, even the smallest spark would cause a big explosion. Kurds are ready to secede anytime, there is a dangeours islamic terror organization just near the border, economy is fucked up and unemployment is record high and Turkey has already a gigantic enemy, Russia. If things go down, Turkey wouldn't be another Syria, it would just cease to exist.
Instead of taking a hostile stance, EU should form an alliance with Turkish opposition to do whatever it takes to remove Erdogan and friends from power and from earth if possible. From the looks of things they have already been doing this exact thing.