Why should we place a cutoff? We can discuss his behavior as of late, as well: Matt saw a successful corporation using wordpress, just like his own, and demanded that they give his own for-profit corporation a large chunk of their revenue. When they declined his request, matt started fabricating all these gripes about private equity and contribution level.
It's quite telling that we don't see matt attacking less successful companies which do the same thing as WPEngine, much less putting forth the same pretexts for it.
Should matt have such a veto power over what the community wants? Put another way, the community has tolerated matt's behavior, but he keeps digging more and more – how do we stop his bad behavior?
And back to the first question: "tolerated" by who? The community embraced WPEngine and their contributions to the community. It's matt that the community can't tolerate.