I don't agree with that statement.
(a) Russian stocks have crashed hard already, and if you believe war is already priced in, you could buy in low, sell high at a later date, and donate proceeds to Ukraine rebuilding efforts, effectively creating a Russia->Ukraine money funnel
(b) Putin might be a terrorist, but most Russian civilian businesses are most certainly not. Many of them don't support attacking Ukraine, as evidenced by the numerous protests in Russia, and likely a whole lot of other people that would protest but are afraid to. The way I see it, "Russia" isn't attacking Ukraine, a corrupt leader of Russia is.