Complex sentence: He was tried alongside fellow neo-Nazi Remi Pontier, were the first two people convicted under the Fabius-Gayssot law; both were members of the neo-Nazi French and European Nationalist Party.
Split into simpler sentences: He was tried along with Remi Pontier, the first two people convicted under the Fabius-Gayssot law. Both were members of the neo-Nazi French and European Nationalist Party.