How could anyone be really certain about evolution without understanding intelligent design? ID doesn't necessarily think the world isn't 5 billion years old or that it was created by the God of the bible.
ID states that many forms of life could not have evolved and appear to have been created by plan. It doesn't say by who or what.
So how do you account for this if you don't know the theory? Why would scientists find explanations for this stuff if nobody pointed out these problems with the evolution theory?
Keeping ID out of school just reminds me of the Church putting Galileo in prison or something. It only helps scientists and students understand evolution better.
There are current studies that back this in how some species have evolved in ways with increasing the number of offsping they have to compensate for the increasing number lost.
Mosquitos directly force the evolution of blood immune systems to recognize and battle different blood viruses that evolve and mutate.
Here on earth virtually every species of life attacks and kills other species of life because it has to to survive. Based on this I believe that chances are that if we meet other lifeforms from other planets they wont be friendly.
I personally believe that evolution may eventually do away with emotions because all we need are logical decision making to proliferate as a species and emotions will only hinder this.
This is why I believe that if life out there finds us it will almost certainly only look at us and earth as a resource for their proliferation and have no emotion as to where we fit in.