I would like to comment, since I went to Haiti on a mission. I had an opportunity to discuss the situation there with Quebec police officers.
The situation is this: they are grappling on a daily basis with not a peace-keeping, but a peace making situation. All they have is a small kevlar vest and a handgun. They are not armed to deal with bandits who shoot at them with Kalashnikovs. They must therefore call upon MINUSTAH when they encounter a blockade where there are people with rather heavy weapons.
A police officer told me about situations where he and his fellow officers had to wait two to four hours, lying behind their truck. He told me that if the Haitians had really wanted to take him out, they could have done so. They had simply decided that it was not in their interest to kill him at that time. The fact remains that shots were being fired around him for three hours.
I have heard on several occasions that MINUSTAH, a complex United Nations organization involving several nationalities, is very slow to react, thus placing police officers in a military role for which they are neither trained nor equipped.