Even if we do have an obligation to end mass suffering and indiscriminate killing, invasion is not the way to do so. Western intervention will inevitably increase the collateral damage by escalating the conflict into a full-scale war. Moreover, there is no guarantee that intervention will solve this conflict in the long-run instead of simply causing another endless war like the one in Afghanistan or Iraq. Therefore, even if we have an obligation to intervention, invasion is not the way to do it.