If we all started calling out everything that might possibly be [X] without being absolute certain, then this stance to accept false positives would result in far too much noise in the form of one of the harshest accusations in 2019.
This sort of stance, where the Presumption of Innocence is sacrificed, to prioritize catching all the guilty, the innocents be damned, is also the stance that leads to the witchhunt mentality. It's a social epistemological catastrophe, where everyone suspects everyone and accusations for ulterior motives cannot be detected.
In 2019, it seems as if this stance is designed to and deployed to cause a social epistemological catastrophe over social media. I suspect this is actually being done!
https://www.youtube.com/watch?v=rE3j_RHkqJc
This is precisely why Blackstone's formulation came to be, and why it's necessary to avoid toxic and tyrannical societies.
Not saying the original comment was racist, but in general I don't think we should be promoting racism.