Considering ~50% of the Knesset is in opposition, I don't think it's proof that a politically large fraction of Israeli society is religiously fundamentalist.
It's non-negligible, but the reasons ultra-right parties like Otzma Yehudit [0] have a voice in politics has more to do with election calculus by Netanyahu.
The ideal 2+ party parliamentary system seems to be >2 but <6.
Below that, you get bad outcomes (US). Above that, you get bad outcomes (Israel, India).
Somewhere in the middle, it forces the right amount of coerced cooperation... most of the time (Germany).
It's non-negligible, but the reasons ultra-right parties like Otzma Yehudit [0] have a voice in politics has more to do with election calculus by Netanyahu.
The ideal 2+ party parliamentary system seems to be >2 but <6.
Below that, you get bad outcomes (US). Above that, you get bad outcomes (Israel, India).
Somewhere in the middle, it forces the right amount of coerced cooperation... most of the time (Germany).
[0] https://en.m.wikipedia.org/wiki/Otzma_Yehudit