What's racist about suggesting someone eats bats? Mammalian flesh is a common food source across human cultures.
The videos of people eating bats that surfaced following the beginning of Covid-19 were from Indonesia.
The way this misinformation has spread is indeed based on racism (Chinese are 'barbarians' who have 'barbarian' eating habits and they should change them and eat like 'normal' people).
Now, (fruit) bats eaten as food in West Africa is a major vector of the spread of Ebola.
And maybe one day we can conclusively say bats play no roles whatsoever in the spread of Covid-19, like we are able to say confidently about bats and Ebola. We aren't at that point yet, dismissing bats as a factor is a disservice to science.
Bringing racism up where it doesn't exist discourages, or at worst suppresses, a healthy discussion.
Now, this thread goes further by continuing to relay the conspiracy theory that the virus is man-made, not least when the paper concludes by claiming that the burden of proof is reversed and that it is the natural origin of the virus that must be proven.