I understand the Irish support for Jacobitism on the grounds of support for a more tolerant Catholic king, but I do not understand Scottish support for it. Given that in the English Civil War the Scots were even more hardline Protestants than most Roundheads, how did this later turn into support for a revived Catholic Stuart line?
The gist of this question was recently addressed by myself and others, which can be found here. If this doesn't completely answer your question, please feel free to let me know and I'll do what I can to help.