The Stalinist system and its non-Russian offshoots were historical particulars, not generic representatives of utopianism. You imply that it is the utopianism which caused millions to die, but you have ignored other examples in the Fascists and Nazis, who were reactionary rather than utopian (they wanted their nations restored from the damage done by liberals and other outsiders), and yet still intentionally murdered millions.
From the utopian examples you conclude that it is a sort of Stalinist slippery slope from shorter work weeks to genocide. Yet you do not seem to conclude the same thing with regard to the church-and-apple-pie traditionalism that Fascists favored. Why not? Well, in each case the happy pictures used are only tangentially relevant to the regimes which used them. So it is quite wrong for you to draw an equivalence between the left-wing pictures and genocide, without also at least drawing an equivalence between the right-wing pictures and genocide. Or concluding that the pictures are not completely relevant.
I don't think it is especially likely for you to be killed by your western government. But for what it's worth, I can't see any reason to prefer being killed by non-governmental agents, or people who have your ideology rather than a left-wing one. Getting killed sucks regardless.
