I will support feminism when feminists protest against male only military conscription in Ukraine. Until then it's just one of "we only care about our own kind of people" movement like white supremacy or black lives matter. If you believe in sending men literally to their death while staying safe yourself, you should be at least willing to do some house work in return. Personally I think nobody should be forced to fight a war and everyone should be able to volunteer, and countries that can't find enough volunteers do not deserve to exist. Pretty sure there will be more men fighting in practice, but if that's by choice, it's not an injustice.