In this kind of crisis, the last thing we need is to be injecting politics into the decision about which treatments are most effective.
No responsible person should offer unproven medical advice IN ANY WAY. And no medical professional should do so unless they have multiple reliables sources to support their advice.
Trump failed on both of these points. If chloroquine turns out to fail, he'll surely promote more possible treatments again and again, thereby whittling away public trust and hope, over and over. That's terrible leadership, and rightly merits criticism from everyone who gives a damn, not just "the other side".
That is what "the other side" was saying.
I repied to somebody saying essentially the same thing as you here: https://news.ycombinator.com/item?id=22760840
Difficult to watch, as someone familiar with chloroquine, knowing they were spreading mistaken information about the side effects and blowing the risks well out of proportion.