This "horseshoe theory" is new to me. But my immediate takeaway is that the horseshoe is not a circle, hence the far right and far left, though they share some similarities, ostensibly bomb throwing, they will never actually meet.
The lines of the horseshoe referenced in the theory are not parallel so in theory they would meet on a linear plane (one of the underlying assumptions).
If they lines are supposed to be parallel - a feature of which one finds no mention - then the theory is further misstated. More sloppy, shoddy work.
