honestly I don't think your conclusion is that accurate as you are missing a common factor between RT/Sputnik and MAGA : both are right wing nationalists .

while from what I remember there is some evidence showing that the raise of the new alt-right in the US is not fully organic , I feel like saying their views are just astroturfed end of discussion is quite pointless .

just to make my point clear : Israel also has a online propaganda campaign which often aligns itself with the views of the Democratic party in the US . one could say something along the lines of "It couldn't be any clearer. What are the odds that Democrat views nearly in 100% [of cases] overlaps with Israeli best interests?" suggesting that the entirety of the Democratic party's support is artificial , which is made easier by the exsiance of Israeli funded political organizations in the US .

but this is of course bullshit . the impact of Israel's foreign politics is not the entirely of the Democratic party , nor is it correct to say that everyone who says anything positive about the Democratic party is a "Hasbara troll" . (also of course as neonazis on twitter have realised , Trump is as also affected by these forces , no you don't want to know)

I believe this also should be applied to the other side : Trump has tapped into preexisting American sentiments towards right wing nationalism and with a mixture of luck , charisma and support from both national and foreign interest groups rallied them around himself .

mind you I'm not saying this to paint the views of Trump's supporters as legitimate , I hold quite opposite views , but because I think your analysis is limited .

lets take the EU as an example : an American nationalist will quite naturally hold some distrust of foreign blocks , which is then compounded by the EU having some liberal policies . its not necessary for a foreign entity to artificially create these views since they are a natural extension of other views this political group has .