I get where you’re coming from too. Especially since the Russians appear to have added that to their list of crimes. Fight uranium with uranium.
I’m very wary of the argument that people can use whatever weapons they like in their own country. War crimes are a thing in international law for good reason.
I’m a strong supporter of the “court of last resort” the ICC, and I firmly believe that it’s the duty of all the world’s citizens to oppose war crimes, genocides, and crimes against humanity wherever they occur.
Fighting war crimes with war crimes happens a lot - we have seen it in the past year in Ethiopia as well - but a line has to be drawn somewhere or attrocities keep escalating and everyone becomes monsters.
For me, that line is here. I appreciate that for you the line might be further along though.