Complex sentence: He ended up repressing his erstwhile supporters the "Integralists" as well, once the communists were already defeated, since the Integralists wished for a total Nazi-fascist dictatorship, which was more than he desired.
Split into simpler sentences: He ended up repressing his erstwhile supporters, the "Integralists," as well, once the communists were already defeated. The Integralists wished for a total Nazi-fascist dictatorship, which was more than he desired.