The other bit of politics that I read into this is that they are making an example of Joe because he is a member (about to be a COM member) of AIPA. Jetstar management are desperate to keep AIPA out of any J* Pilot EBA negotiations - they are more likely to get their way with the AFAP being the industrial body representing Jetstar pilots.
I'm sure that AIPA will be throwing all of its resources behind Joe to ensure that he is reinstated and he has the full support of both mainline and Jetstar pilots.