No it couldn't. Why would a book about / promoting one of the 'main religions' be sure to sell no copies? I'm not advocating the store declining to sell something provocative. I'm suggesting that their choice to not stock this book in Liverpool, can be viewed purely as a sane business decision.
To be frank, had they stocked it, in their Liverpool branch, they would have sold zero copies. Why should they pay for stock that they know is never going to sell (and would probably get defaced / damaged?