i haven't read the full thread but i can imagine the topic of debate in relation to Ryan Jack.
Booing players is not isolated to Rangers/Scotland players. I was in Dortmund for the last campaign, Scotland were Germany's first opponents IIRC since winning the world cup. I got chatting to Borussia Dortmund fans outside the stadium pre match who were going to boo Mario Gotze, the guy that scored the winning world cup goal. And right enough, they did.
Gerard Pique another example for political reasons, a guy that's won three major tournaments with Spain.
I don't agree with it, but sadly it's part of football. I hope Ryan Jack is thick skinned enough to continue to play for the national team - he could be the answer at right back longer term.