Answer to first question is multi-faceted:
1. Because Sheffield Wednesday fans are the most deluded football fans on the planet. There are countless examples to prove this point. Lee Strafford, erstwhile Chairman of SWFC claiming potential for up to 4 or 5 million fans across the world for one.
2. Sheffield Wednesday fans always respond to what SUFC do. Again, countless examples. The band, Balloons at Wembley, adoption of SUFC songs etc etc. It follows that they counter Blades claims of The Star being biased with their own.
Their are also numerous examples of The Star showing blatant and more subtle bias, the most notable being the "Save Our Owls" campaign.
So yes, you are right Danny, it can't be both. It's one way, and that way follows the A61 towards Barnsley.
I read The Star for years, every day. There are a number of reasons I no longer purchase it. The general quality (IMHO) is the main reason but over time, I concluded that 1. it was no longer worth the money, 2. it no longer had a relevance and 3, the aforementioned bias towards SWFC.
Hope that helps