Opposition Union!!?
I think that you will find that both VIPA and the AFAP represent the pilot profession.
The only tangible difference being VIPA represent a very specific pilot group, i.e. the VA Group pilots; the AFAP represent a very broad base of pilots in the greater industry.
The intangible difference between these to representative bodies is the politics and agendas represented by those in the executive.
Both are unions, both purport to represent their members. To allege that these representative bodies are in opposition would only serve to support the intangible aspect of each.
I have to say that I find the mood and comments on this website do get agitated.
Some other forums like AVForums and Car racing forums are far more cordial in their discussion, even though there are numerous differences of opinion. Food for thought....