Moderates would rather lose to fascists than compromise with leftists and progressives.

  • FPTP is used for parliament in those countries

    No, it isn’t always. In Germany for example, you have two votes per state and federal election. One vote goes to a candidate in your district (fptp, yes) but the other vote is just for a party. The parties put up lists of candidates and parliament gets filled proportionally to the votes they got nationally or statewide.

    Now all these smaller parties could form a coalition to get the majority or just use their extensive array of minority opposition powers that the law grants them.