Millions have marched in France , now what?

A great show of solidarity was shown in France for the victims of several terrorist attacks.
But now what?
The problem of a Europe overwhelmed with Moslems has not changed and will not change any time soon.
There is not enough man power to deal with the infiltration of terrorist cells on European soil.
The next attack is imminent and there is great difficulty in stopping.
The source of the problem needs to be attacked.
That is destroying ISIS and al queda wherever they are on the face of the earth.
Doe the French have the gumption for this?
Does anyone in Europe have the gumption for this?. <
The simple answer is no.
The worst is yet to come.