No it is based on Culture. Islam is a culture incompatible with Judeo-Christian values.
You miss my point.
For FN the view is that culture emerges from the French as a "race" or biological entity.
For conservatives the view is that first principles - in the case of the West, Judaeo-Christian values - create culture, not blood.
Syed Farook and Bobby Jindal have the same ethnic background, and Charles Cooke and Piers Morgan have the same ethnic background as well.
But two of them are staunch defenders of the West and its Judaeo-Christian values, and two of them are enemies.
FN would want to keep out Jindal and let in Morgan.