Several years back Turkey barred some French companies to participate in one of its arms procurement tender. Turkey doesn't allow French military air-crafts or ships to pass its territorial space. Moreover, the row continues in connection with a French parliament-bill that aims at recognizing Armenian genocide. 

What is the root cause of the deterioration of French-Turkish relationship? And, when did it start to deteriorate? Why France is undermining its relationship with Turkey? Why is it so important to pass a bill that threatens the relationship?

On the other hand, [Turkish-German and Turkish-Italian relationships](http://en.wikipedia.org/wiki/Recognition_of_the_Armenian_Genocide) seems not to affected.

Why?