Come off it Dirk, at some or other point the people have to take responsibility for their own existence. They can't keep blaming it on others. I would not even dream to compare Rwanda with Haiti, the people of Rwanda are completely different to those in Haiti, and as far as I can see for this present time anyway, much more willing to take responsibility for their own country. The energy that they have put into getting themselves on track after those awful wars, is far ahead of any of what I have seen in Haiti, people of which seem to be waiting for hand-outs most of the time, unwilling to take charge of themselves.
Well, you could take the example of most of the continent of Africa. Much of it was colonised, the people enslaved etc. It's now one of the worst-off continents on Earth, if not the most.
Rwanda, to use the example you chose, became independent when its colonial masters, the British, withdrew. They helped build some of the infrastructure - hell, there was already a lot of structure still there from Brtish ownership, to build on. Britai has taken special interest in Rwanda to help them. It hasn't been brilliant, but Rwanda got help.
I agree with you, it is indeed foolish to compare Rwanda with Haiti, which liberated itself from France - which has taken extra special care to make sure they remember it. It got no aid, no help in restructuring... There is a gulf of difference. But they both, of course, remain steadfastly third world countries.