As an American, I am happy that the US develops and fields weapons, including A-10's, that help win conflicts.
War always sucks. There is always suffering and innocent lives lost. This is better solved by limiting what wars we engage in, than in feeling bad about our warfighting equipment.
I'm not ignorant to human nature and our inherent trend towards conflict, I'm just somewhat sad that our culture in particular throws the metaphorical gas on the flame.
There was a lot of focus on DU at times, especially with regards to Gulf War Syndrome (perhaps because of the "uranium" being in the name) but I believe most of the focus has now shifted elsewhere, particularly with regards to the anti-chemical and anti-biological mixes soldiers were given in the run up to the invasion. I can't find many of the articles I've read on this over the years, but Wikipedia has a decent summary: https://en.wikipedia.org/wiki/Gulf_War_syndrome#Causes
The thing with DU and what ended up ruling it out as much of an exposure factor is that it is extremely heavy. Particulates of it don't travel far. They sink, fall short, etc. They don't waft around in air or get suspended in water like some compounds do. I don't think anyone would suggest that you ingest the stuff, but from what I'd read, the extreme weight of the stuff kept it localized and unlikely to be ingested or exposed to in any amounts that would cause wide issues.
That there were other factors that could cause these effects I don't dispute. But it was my understanding that it was determined that it was concluded DU wasn't one of them.