[dragonwriter]

> In particular, everyone in the center-left knows that there's no point in trying to cooperate with Binyamin Netanyahu because he is guaranteed to betray them and not uphold his part of whatever bargain they make. Everyone in the right knows that they can't cooperate with anyone outside of Binyamin Netanyahu because they'll be accused of being evil terrorist supporting leftists and will lose many votes in the next election.

So, by your description, due to the polarizing influence of a particular personality (a—and I get that Netanyahu’s political longevity makes this east to forget—transitory situation) you have, despite (but not because of proportional representation) the dynamics of a two-party system with potentially influential potential defectors from a majority, rather than the normal dynamics of multiparty coalition building.

Guess what, that’s a fairly common state of FPTP independent of personalities; the potential defectors just aren’t conveniently marked with a different party label than the solid partisans.