I just reckon that players that aren't doing well enough get abuse. Some more than most but the reasons for that can be fans know what players can do and if they don't perform to those standards they get pelters (Booth, Jess, Severin, Clark, Mackie) and others who are genuinely painful to watch (Bus, Mair, Duff, Foster).
Add to that a very reactionary and fickle support and you get players getting ripped badly irrespective of where they are from.