For those concerned about the US supplying cluster munitions to Ukraine I have to ask why they think 1) that the ZSU would fire them at populated urban centres or 2) how their application in any way enormously increases the danger to civilians in what is arguably the most-mined region on earth.
War is not an inherently moral enterprise. The moratorium on this or that disappears when you're on the receiving end of an invasion.
If Russia had refrained from using cluster munitions against Ukraine from the start this might not have become an issue.
Unfortunately the West is playing catch-up.