That's the whole point of consensus decision-making - to prevent usurping power in the UNSC by a US-lead coalition (or any other for that matter). The reason fo

That's the whole point of consensus decision-making - to prevent usurping power in the UNSC by a US-lead coalition (or any other for that matter). The reason for the veto is lack of credible evidence that the use of sarin wasn't a terrorist's provocation. So, in fact, what we see is that UNSC system is actually working preventing an aggression agains a sovereign state.