Even if it is a pretense, it is pretty obvious that this would allow ship-borne drones to use the wind farms as an effective screen. Putting radar platforms beyond the wind farms that are as capable as the existing land-based radars would be quite expensive in both capex and opex. Some of the existing land-based radars would likely need to be moved, ideally. No one was really thinking about this type of threat a decade ago.
That said, Democrats have also been trying to stop offshore wind farms for years (e.g. Vineyard Wind), so there is probably bipartisan support.
The construction on some of these windmill farms started years ago. Before that permits & legal has been in the works for a long time. This surely included security clearances.
The orange shrimp pulling the “national security” card now, on the same day as he also creates a new Greenland debacle, is very clearly simply an attempt to strong arm the danish govt into Greenland concessions (in turn simply to please his fractile lille ego)