“the 440-foot tall turbines could cause unwanted “clutter” in the systems.”
Pure BS (technically speaking). Air traffic control systems use two type of radar, primary - which relies on bouncing the actual radar off the skin of the aircraft, and secondary - which relies on interrogating a transponder aboard the aircraft that is transmitting a discrete code (radar beacon). Secondary radar is the method used for modern ATC systems. Primary radar systems are not used by ATC, unless the secondary system is down. It’s akin to a backup/emergency mode.
Primary radar is used for air defense purposes (which is what I think this report is talking about), so why would the FAA be squawking about a DOD issue?
One do wonder.
The easy fix would be to install an SIF transponder on each of the wind turbines. Interesting that you used the term “squawk” to mean complain.