The point being made is that a lot of Democrat voters limit their action to simply voting Democratic and lying by claiming the Democrats are lesser war-hawks, when historically both parties are fundamentally the same in perpetrating death globally. The post title is mocking the soldier in them using “I voted for Kamala” as a defense for his actions, i.e. I didn’t want this to happen so I voted democrat. Also, the joke could be taken further as a “Just following orders” theme, given the soldier voted against this and didn’t want it to happen, but still committed the war crime as ordered.