pete, scientists do not "push doctrines". They assemble facts and propose theories. Its not my subject, but from what I hear from people whose subject it is, the most favoured theory at present is that birds evolved from theropod dinosaurs. And there is substantial fossil evidence, particularly from China and Mongolia, that many theropod dinosaurs had feathers. And possibly preserved feathers in amber, which may be from birds but more likely dinosaurs.

Now what evidence do you have that this is not so?

And what the blazes is cmi??