In America, a minority ideology that is, say, 20% of the country, will end up with little or no representation in the Congress, since you need a majority in any district to get elected. In Israel, such a minority would get 20% of the seats.
For example, Hareidim are roughly 10% of Israel. They typically get 10% of the seats. If Israel has a single member system, you would probably get an hareidi elected from Bnei Brak, and maybe two or three for Jerusalem (depending on how district lines are drawn), but that’s it. There average district in Israel would be over 50000 people, and in the rest of the country you won’t find areas that size that are majority hareidi. You would have perhaps three hareidim in the kenesset (there were 18 in the outgoing one), all focused on the local interests Bnei Brak and Jerusalem.