The FNF’s Celtic cross symbol revealed its fascist orientation.

Evidence

The political orientations of the F.N.F. were left in little doubt by the symbol which Ortiz, the Poujadist and admirer of Salazar, had chosen for it; the Celtic cross of the unashamedly fascist Jeune Nation movement. — Horne, Alistair, A Savage War of Peace- Algeria 1954-1962, 1066