When do these military interventions actually work? When does it not involve our citizens getting killed and left with mental emotional scars so multinationals can attempt to protect their interests?
The world is more connected, but we can't fight everyone's battles.
There's also a risk that military intervention will escalate things. Cold War style proxy wars is something else we can do without.
Military intervention is a last resort. As I mentioned, NATO's first course would likely be sanctions.