Tonight was always going to be a difficult match for St Johnstone, and Celtic’s ruthless 6-0 thrashing can’t have been easy to take. Going into the match without a permanent manager following the sacking of Craig Levein, few gave the home side a chance of picking up a positive result against the on-fire champions. Celtic lived up to their billing with goals from Kyogo Furuhashi, Paulo Bernardo, Callum McGregor, Daizen Maeda and Adam Idah raining down on the home side. Brendan Rodgers was certainly left impressed, picking out the tireless Maeda as the team’s catalyst off the ball, allowing them…