Among the dead in last week's Paris attacks were two sisters celebrating a birthday, a promising architect, a talented musician and a woman shot while out doing some late shopping.

What they had in common was that they were Muslims killed in the random slaughter carried out by the Islamic State.

Most victims of violence by the Islamic State and other jihadi groups are Muslims, since the groups fight mostly in majority Muslim countries and often attack less radical Islamic communities, such as Shiites and Sufis, whom they consider to be heretics.

Islamic State — widely known in Arabic as Daesh — claimed responsibility for the attack against "crusader France," implying all French are Christians. With Islam the second-largest faith in Europe, a massacre there is very likely to include some Muslims among the victims.

"Daesh has been killing Muslims by the thousands for years in Africa and the Middle East," said Yasser Louati, spokesman for the Collective against Islamophobia in France (CCIF).

"Now they're killing Muslims here in France," he said.

"The word 'Islamic' in their name is only a pretext for their ideology. Look at the series of attacks they've made. There's no end."

France's Muslim minority, the European Union's largest, makes up about 8 percent of the population.

Judging from published lists of the 129 dead in Friday's carnage, about 6 percent of the dead have been identified by family and friends as Muslims or people with ethnic origins in majority-Muslim countries.