This is definitly unsportsmanlike, and therefore not tolerated. Coaches get one warning and if they do not comply, they can take it in the parking lot.
I had a similar situation two years ago in fall ball where two coaches on the same team were yelling at eachother! I was hoping it would die off, but it went on for a good two minutes. After that, I got fed up, and I told them once they are ready to continue, we can continue. I got my partner and we both walked to right field and waited for them. They still continued on for another minute or so, but after that it was silent the rest of the game.