I don't see why you are bringing "a Scotland team full of Kiwis and South African-educated players" into the conversation; the implication I get is that if it wasn't for these 'mercenaries' coming in, England wouldn't have lost on Saturday.
Moreover, most of the 'foreign' Scottish players qualified via the Granny Rule, so they do have Scottish blood. If you want to complain about naturalisation, fair enough, but I think the only two players on the Scottish squad who qualified through residency were WP Nel and Cornell du Preez.
Also, Dylan Hartley, Nathan Hughes, Mako Vunipola, Billy Vunipola, Ben Te'o and Denny Solomona all qualified for England either through the Granny Rule or through residency; if you complain about Scotland having a team full of Kiwis and Boks, then you have to apply the same standards to England as well.