Soldiers? Many wars are fought for unjust reasons, and soldiers just obey orders without considering if the orders are justified (e.g. Russians in Ukrainian, US in Irak, Dutch soldiers in Indonesia after WW2)
edit: for an example, the entire US military is around 0.45% of the population. Only a small fraction of that is not purely support. Around 0.2% of the population are police. The vast majority never kill anyone.
Millions of soldiers is significant, even if it is low in percentages.
There are more people in the army then there are women having abortions, so if abortions is a big enough issue to address, people killing in the name of should also be considered an issue.
edit: for an example, the entire US military is around 0.45% of the population. Only a small fraction of that is not purely support. Around 0.2% of the population are police. The vast majority never kill anyone.