Holeindre also served as the vice-president of the National Front (FN) where he represented the "national-conservative" tendency, opposed to "nationalist revolutionaries" and Third Position ideologies.

In 1989, he wrote À tous ceux qui n'ont rien compris ("To those who haven't understood a thing") in which he claims to have stolen two machine guns from the Germans in August 1944 and that the operation got a friend killed.

It has not been proven or denied he joined any Resistance organisation afterwards, but it can be assumed he never had any connection with the German occupation forces as he did not receive any jail sentence after 1945 (which was a pre-requisite to any investigation for suspicious persons about collaboration in France at that time).

He joined the Organisation armée secrète (OAS), a right-wing terrorist movement opposed to the 1962 Évian Accords which granted independence to Algeria.

He supported Le Pen against Bruno Mégret's attempt to seize control of the FN, and claimed to follow Jean-Pierre Stirbois's nationalist and solidarist current.

[16] He supported Bruno Gollnisch during the campaign for the leadership of the National Front in 2010, defeated by his rival Marine Le Pen the following year.