I’d had been a bit miffed if Alexis Mac had gone to Bournemouth, Fulham, Forest or whoever we measure ourselves against these days rather than Liverpool so I can see why some of their supporters might feel aggrieved by losing Trent A-A to a direct rival.
Is Trent going to Manchester? No. So the comparison is if Alexis played for us for years and then went to club with better trophy prospects in Spain. We'd have been ok with it. There's no excuse for Liverpool fans giving him shit. None.