This will be the first night of the event, so any songs and criticism will be taken on board by organisers I presume and any issues will be ironed out - as it is with any event that’s starts up.
From my point of view, if it was me organising it I wouldn’t hire anyone who supports independence, but I won’t place any blame at the organisers for not stalking their facebooks to find if they support the SNP or not.
Being tasked to find musicians in Glasgow isn’t an easy task. Music artists tend to be the arty farty types who support veganism, independence and Palestine for example. Musicians don’t have it easy, so I wouldn’t begrudge anyone for playing in an Irish themed bar, where they are guaranteed to rake in money, as they are obsessed with their music. If they were playing Rebel songs, that would be an entirely different matter.
Finally, just because someone supports independence (which I don’t) doesn’t make them any less of a Rangers supporter than you or I. I know a few who do and put their heart and soul into fighting for our club. Jim McColl, a nationalist, donated 3000 of his own shares to RF when it started up.
Having differing political views shouldn’t have come into this. It’s an apolitical event for the love of Rangers.