The US should be very careful when calling for war crimes prosecutions against Russia
The US has not called for international war crimes prosecutions against Russians, which, even within the ICC system, are a backstop against failure of the criminals own country and those where the offense happened and any others which might have direct jurisdiction to have the ability and will to take action.
It hasn't even called for war crimes prosecutions of any kind.
It has described it's conclusion that Russia has committed war crimes, which is not the same as either of the above things, in the context of promoting the urgency of stopping the campaign in which they have done so so as to deny them the opportunity to commit more.
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The US has not called for international war crimes prosecutions against Russians, which, even within the ICC system, are a backstop against failure of the criminals own country and those where the offense happened and any others which might have direct jurisdiction to have the ability and will to take action.
It hasn't even called for war crimes prosecutions of any kind.
It has described it's conclusion that Russia has committed war crimes, which is not the same as either of the above things, in the context of promoting the urgency of stopping the campaign in which they have done so so as to deny them the opportunity to commit more.