I can understand both views,on one hand if you join a war where you aren't needed then you show your allies that you will back them through thick and thin.
On the other hand staying out shows the world that you won't agree with all of your allies decisions.
Doesn't really show you're "independent" though since you guys joining honestly was not necessary at all since, you would just be adding more people to a war where you already outnumber the target 4-1.
That's just imo though!