I think the issue is that recent governing coalitions' majorities in the Knesset (over and above what they need to appoint a prime minister) is smaller than an

I think the issue is that recent governing coalitions' majorities in the Knesset (over and above what they need to appoint a prime minister) is smaller than an individual small party. Consequently, an individual small party could unilaterally bring down the government (or threaten to).