PARIS — Last week’s terrorist attacks without doubt set all of France on edge, but the sense of wariness, even siege, has grown increasingly profound among France’s Muslim population — the largest in Europe — which seems braced for a potential backlash, both political and personal.

Since the attack Wednesday on the offices of the satirical newspaper Charlie Hebdo, several mosques across France have been hit by bullets or small explosive devices. Many more have been tagged by racist graffiti. In Corsica, a severed pig’s head was hung on the door of a prayer hall, the police reported.

Those actions followed weekly marches by tens of thousands in Germany, demonstrating against what they call the Islamization of Europe, the firebombing of a mosque in Sweden and warnings by British officials about a rise in Islamophobia.