We took out tons of infrastructure in Iraq during shock and awe. Utilities were on the target list. We were about to occupy it. That was incredibly stupid. The infrastructure itself was not collateral damage, it was targeted. We have no occupation plan, it was that stupid. The destruction resulted in millions of extra deaths due to the impoverishment and destruction of Iraqi society. Yes, we bear responsibility for all those deaths. You break it, you own it. That's war.
The US goes out of its way to minimize collateral damage because it gets accused of causing all collateral damage in the first place.