We are not talking about shedding blood here - All Australia was asking for was a few hundred soldiers for a peacekeeping force.
A "peacekeeping" force is all about shedding blood, and the threat thereof. The soldiers are placed in potentially deadly situations, and keep the peace by threatening to shed blood of those who do to others, and the soldiers risk their own blood in the process. Consider how many TFLers have publicly stated that they would use light-blue helmets as targets should they "invade" our country; why expect different of a mob that is slaughtering their own people in the name of country unity? If the current marauders are putting on poles the heads of those who support independence, who's to say they won't do the same to foreign troops if they are rumored (don't expect truth to rule there) to be present to enforce separation?
With respect for the job, the purpose of a soldier is to kill people and break things, and to risk their own lives in the process. Expecting soldiers to never die during a "peacekeeping" operation is absurd; the only reason so few US soldiers have died in recent operations is that they're so damn good at their jobs.
It's ok for Australia to ask for US intervention...as long as those asking fully understand that they're asking 10,000-miles-from-home people to risk their lives for total strangers in a country that has virtually no relevance to life at home.