Celtic’s domestic performances have been really inconsistent this season. When they are firing, Brendan Rodgers’ side are unplayable. That’s just a fact. the 6-0 win over Aberdeen and the 7-1 thumping of Dundee shows that when this Celtic team are in the mood then they will run over the top of any and all opposition in Scotland. And that is what Jim Spence fears for St Johnstone this weekend. The former BBC man was speaking about the upcoming Scottish Premiership fixture against Craig Levein‘s side when he warned that The Saints could be on to a hiding in the 3pm kick-off at Paradise. Spence s…