Looking at the issue from the perspective of an engineer, I can say that no way will windmills cause interference that would overcome the abilities of a experienced radar technician to filter out. The turbines operate at a fixed (or at least very slowly varying) frequency which means that a straightforward notch filter should remove unwanted signals. After such filtering, radar should not experience a problem from phantom motion interference at all.
And I don't buy this rationale either:
A bureaucratic delay was created by a provision in a congressional bill that wind energy companies say was drafted to create more hurdles for a high-profile and controversial offshore wind project near Nantucket, Mass.No way. This has got BushCo fingerprints all over it and they have followed the first law of projection by blaming the opposition for their own actions.
The law required the Department of Defense to issue a report assessing the impact that development of wind turbines would have on military radar.