I guess part of the ideological purity in question is from the perspective of the epicenter of wokeness. From this perspective, anyone who isn't fully onboard (or doesn't indicate that they are fully onboard) with cancel crusades is impure.
And this position, as drastic as it can appear, isn't without reason. Given that it is oriented, to whatever degree, against the reigning hegemony of passive/implicit white supremacy and the like, it needs to risk false positives/accusations. Especially because it is pitted against unconscious bias. A real mess, but one that arguably needs to get made.
Part of the difficulty I'm talking about is: its nearly impossible to defend both sides of this woke left / anti-woke left front, without alienating your company. At least I've found that to be the case.