That is an indeed big tragedy and especially terrible for the victims and their relatives/friends. A similar attack occurred in Ankara (Turkish Capital) by ISIS (A fabricated, manipulated, cursed, stupid, retarded, so called pro- but actually anti-islamic and abominative organization which kills innocent people to teach a lesson to their so called enemies) and killed more than 100 people in October. Also in Beirut and there is a suspicion on whether the Russian aircraft was also a target of ISIS rockets...
Yet let's also use this shock to remember that these kinds of mass-killings are regularly happening in Iraq, Syria, Afghanistan, Pakistan etc...More than 1000s of civilians have been killed. And i am really getting angry when i see Obama comdenming these attacks for this terrorism is actually invented by the world powers to wage their proxy wars, and keep their "allies" in check. Curse and hate the terrorists, but also hate the ones who have the power to eradicate them yet do nothing! Is it so hard for the Western powers to rip ISIS out of face of the world? Or if they are so powerful, where do they get such advanced warfare from?! Are there secret underground factories in the Middle Eastern deserts or something? I might sound like a conspiracy nut, but please while comdenming such attacks, also look at who are the mass producers of bombs and weapons, and in need of a market to maintain their income!
I hope for all nations to get sincere leaders to lead them and handle these global matters swiftly. Let them try to polarize and provocate people to hate each other! If we keep a strong dialog and co-operation between different nations, races, or religions, their terrorism will have no point.
But all things aside, the deaths are real, condolences to the victims and all affected. It is pretty easy to speak and write something here, we will never know how terrible it is to suffer such things.
I pray that their attacks will not be repeated. Unfortunately, it is advised to all people in Europe to refrain from crowded places as long as they are not obliged to be in there.