I may be wrong but I think Oman is referring to you being management's messenger about the smaller stations. Your red ink suggested that you even believed what your manager said even though you don't support it. It was a lie and not worthy of any belief and it damn sure wasn't worthy of a GC being managements messenger. Let management bring its own message. Your job is to deliver messages from those you represent, and advocate them, and to reject those things which are lies from management that are derogatory by nature towards those you represent. It was a lie you brought forth that wasn't worthy. If you could substantiate it with evidence then that is something entirely separate, however you couldn't and didn't. Tally ho, brought forth evidence that proved it a lie.
Management already uses other airline personnel who make significantly more than fleet service does so the wage is clearly not as significant in the matter as your own opininon thinks. Also, when tracking non-union airlines, they often pay contractors more than their own employees. Employees are not well liked by airlines.
As far as bashing a GC, I'd prefer Oman keep the past the past, but when moving forward, let us not think that GC's are above the democratic process which involves discussion and dissention. The most revered of all is the rank and file, not the GC. The GC is to serve that which is represented and not the other way around. To that end, I think you and CL have done a decent job.