I read from a local source early on, that the perp registered Republican because it was a closed primary and the local democratic organization had new registrations do so as republican and vote for Haley and against Trump. The perp did so.
That happened, and happens a lot in states that do not have party only primaries (ie “open Primaries”). FL, for example does not have open primaries. Independents cannot vote in either D or R primaries, and also of courses Ds may not in R and Rs may not in D primaries.
In PA particularly demonrat party got people to register for the time of the primaries for republican- and tried to steer the result to Haley. It did not work, because Haley was swamped by real Rs.
It is no surprise at all that this wannabee mathematician (too bad he didn’t pursue that— which is much harder than being yet another mouth screaming about “un fair”!) would whine about the topics he did- and use a kind of “logic” that was flawed from the get go.