He said that Clark could never go to Texas, he would have been hanged to the nearest tree.
Yes, that was just one of his bad decisions.
Undoubtably, Clark was getting a lot of pressure from his superiors to take the Gustav line, so in all fairness, it probably was not all his fault. He was in a very inferior tactical position. Clark was a vain man, however, and a darling of the presscorps. He wanted desperately to win a big victory at Cassino. So he used the old WWI French tactic of "let's charge the machine guns until we're all dead".