The fact is that believers and non-believers do not look at events in life, including disasters, the same way. They do not draw the same conclusions from them , and do not end up in the same place with respect to them. 

The Land of Palestine under Islam has never belonged to the Palestinians, this is a historical fact. It has always belonged to the Islamic Khilafah and the last Islamic Khilafah to possess it was the Uthmani (Ottoman) Khilafah. The Ottomans lost it when the Arab nationalists stole it from them by siding against them with the Colonial powers. For that crime of treason against the Islamic Khilafah, those guilty removed themselves from the shadow of Islam, while Allah cursed them for their crime for the next 70 years, an event they have never recovered from and which only became worse. This has been the Shar'iy view of Muslims regarding Palestine for the past 100 years. Under Islamic Law Palestinians have no right to own the land, and less so the Jews who have played foul with their covenant.

The Paris terrorist attack is one more in a series orchestrated to foment global war against civilian populations. It is part of a neo-imperialist, neo-colonialist agenda which aims to divide and conquer European, Middle Eastern and African populations. A war is being waged using terrorist proxy groups against nation states who are resisting US and Israeli hegemony. Today's terrorism ultimately serves only the interests of a small, tyrannical ruling elite. 

How many hearts have been lost in an effort to win arguments? And yet, as human beings it is natural and even our right to disagree, and to think critically. One of the most difficult challenges of character for Muslims of every profession  is being able to practice hilm (forbearance) during times of anger and disagreement.