Complex sentence: It was this and other things that earned Eicke a fearsome reputation-even within the SS; he was described as brutal and evil, distrustful, cruel and ambitious, full of hatred for everyone who did not agree with the Nazi ideology.
Split into simpler sentences: It was this and other things that earned Eicke a fearsome reputation. Even within the SS he was described as brutal, evil, distrustful, cruel, ambitious, and full of hatred for everyone who did not agree with Nazi ideology.