Football crowd chants being well known for their infallible logic. I suspect some of the brighter Stoke fans were thinking:
"Oh, this is quiet. Great! Let's ensure we don't provoke a reaction from the Kop by singing anything derogatory - spread the word. Let's just clap politely and whisper, it's important that we maintain the psychological edge and maximise our chances of victory. Don't buy any food or drink either, that just goes straight to their bottom line and further increases their match day revenue, thus improving their ability to attract the best players with higher transfer fees and wage offers"