Ukraine finds an inventive way of killing Russian soldiers (https://kyivindependent.com/ukraine-behind-fpv-goggles-explosions-in-russia-source-claims/) and tankies call it a war crime because there is a possibilty of a risk that a civilian could have died.
It's cool to have such an impossible standard for what constitutes lawful warfare allows you to equate the victim defending itself to the invader.