Another possible reason for the attack on Hydroxychloroquine....Overlooked by, just about everyone. I have been trying to gain some attention onto it. Perhaps you can add it into your plethora of valid information.

Conclusion
Chloroquine administration prior to radiation had a significant effect on the survival of normal but not ATM null mice strongly suggesting that the in vivo effect like the in vitro effect is also ATM dependent. Chloroquine improved the early engraftment of bone marrow cells from LDR irradiated mice, presumably by protecting the progenitor cells from radiation injury. Chloroquine thus could serve as a very useful drug for protection against the harmful effects of LDR radiation.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3388169/