It's not really the qualifying (or lack of qualifying) that got him in trouble, it's the falsification of records by his subordinates that made him vulnerable.
Someone was out to take him down and he should have CYA'd himself.
The MSM smear machine is working overtime and it sounds like Schwarzenegger pitched him overboard rather than stand up and fight. So what if he didn't qualifry. I imagine an Major General has a lot more important things to do than spend time at the range. When's the last time an American general had to fire his weapon in self defense anyway? I'll bet it was a hundred years ago or more.
As for the trip, the guy already said he invited other people so it wouldn't be a partisan group. If there's some kind of disaster in California in the next few months and the Guard isn't ready for it, the leftists and the MSM will be to blame.