While combatant deaths are mostly men in wars, so too are civilian deaths. 100,000s of men have died in the 21st century due to US involvement in wars.

https://www.thelancet.com/action/showPdf?pii=S0140-6736%2806%2969491-9 - You may need to create an account to see the full article for free

Part of typical left wing belief is to limit wars and limit combat deaths especially those of civilians. This helps men in other countries by not killing them.

Most deaths are of men https://i.imgur.com/TXOLBcT.jpg - this study is over 03-04 in Iraq, where over 100,000 civilians were killed.

The male-to-female ratio of post-invasion deaths was 3.4:1 for all deaths, and 9.8:1 for violent deaths (all deaths: 144 female, 485 male; violent death: 28 female, 274 male).

An estimate ~250k civilians have been killed in Afghanistan, Pakistan, and Iraq, along with ~110k fighters. Source I've seen other sources before with estimates in the low millions when counting more indirect deaths.