This is sort of restating Karl Poppers "Pardox of Intolerance". As Popper points out, If you do tolerate intolerance, you end up awash in intolerance.
https://en.m.wikipedia.org/wiki/Paradox_of_tolerance
The paradox of tolerance is a philosophical concept suggesting that if a society extends tolerance to those who are intolerant, it risks enabling the eventual dominance of intolerance; thereby undermining the very principle of tolerance. This paradox was articulated by philosopher Karl Popper in The Open Society and Its Enemies (1945)
Attacking those resuppluing or supporting Israel in thier ongoing genicode against Palestine.