They killed him for saying stuff like this. I just saw a good documentary on the subject worth exploring/validating - Silence Patton: First Victim of the Cold War.

He was no nonsense, and couldn't wait to get back home and tell the people about the egregious f*ck ups of his "superiors".

He knew it would ruin ikes chances at the presidency, and so did ike. So he was snuffed out, and ike held a conference to tell all the top brass to "stand together" and actively hide their many mistakes or claims/aspersions to that affect.