There is an enormous difference between the far-right being part of a coalition under a fair electoral system (for completeness, this rarely happens anyway) - in which the far-right lack a parliamentary majority and can't do all the awful things they desire - and the far-right having a parliamentary majority on a minority of the vote under a FPTP system.
We have seen that, under FPTP, it's possible to win a large majority on a 35% vote share - as Labour have done twice this century (2005 and 2024). The Tories + Reform just won a 38% vote share between them, so what do you think happens under FPTP if a Suella Braverman or Priti Patel led Tory party decides to fight the next election in an electoral pact with Reform?
This is the inoculation I am talking about. If the far right get 38% of the votes, I damn well don't want them getting >50% of the seats as tends to happen in FPTP.
