Doesn't matter where they are, soldiers must remain professional when handling weapons. Banter is fine, but there is a time and place for it which is not the battlefield.
General Patton didnt go around swearing at his subordinates nor does he ever recommend it, your quote is taken seriously out of context.
When I want my men to remember something important, to really make it stick, I give it to them double dirty. It may not sound nice to some bunch of little old ladies at an afternoon
tea party, but it helps my soldiers to remember.
You can't run an army without profanity; and it has to be eloquent profanity. An army without profanity couldn't fight its way out of a piss-soaked paper bag. … As for the types of comments I make, sometimes I just, By God, get carried away with my own eloquence.
He would say something like hurry up and load the f*cking thing! or bring me the god-damn radio!
and definitely not yelling at his men and constantly calling them motherf*ckers and sisterf*ckers while they are doing their jobs.
There are several major reasons why, it severely undermines your authority, puts unnecessary pressure on the men, and adds confusion in communications.