"First, in every job I've every had, its considered beyond the pale, to swear and curse (be profane) in a formal meeting. "
Depends on the manner and tone in which the curse word was said.
"Second, Bush was adament and stubborn in addition to cursing. "
The article stated "Bush was described as folksy, adamant and mildly profane"
So he was set in his position and he emphasized that position to them. That is not uncommon. The fact that he did it in a simple, unpretentious, friendly manner would suggest that he did not come in all angry or irate... and would also suggest that the use of the "profane" language was indeed mild as the article suggests.
"If you were in a meeting with Chrysler Corporation stockholders talking about how the company was tanking because of bad corporate strategy and policies, and then the CEO barged in swearing, and adamently and stubbornly proclaiming that he/she wasn't going to change course or do anything substantially differently, you would be shocked. "
If Bush had walked into a room full of voters, then I would agree it would be shocking. But that is not the case. This is like the CEO walking into a meeting of a group of company execs. That would not be shocking at all.