Earlier quoted context omitted.
He's not exactly a role model when it comes to communication.
Perhaps he should be. This idea that we should tolerate terrible things and only respond to them politely seems to produce bad outcomes, for some mysterious reason.
My argument against how he handles things has always been that while it may seem effective, we do not know how much more effective he would be if he did not curse people out for being dumb fucks.
And it doesn’t seem like this is a requirement for the job: lots of other project leaders treat others with courtesy and respect and it doesn’t seem to cause issues.
The reality is that it is easy to wish more people were verbally abusive to others when it isn’t directed at you. But soon as you are on the receiving end of it, especially as a volunteer, there is a greater than not chance that you will be less likely to want to continue contributing.