US has ASML- lots of the patents are ultimately owned by US entities, a great deal of the research and development is done on US soil, and the Netherlands aren't rocking the boat on sanctions, etc.

The EUV light source in ASML’s lithography tools is designed and manufactured by Cymer, based on research funded by the DoE in the 1990s and conducted at various national labs.

Doubtful. It's also doubtful this is about national security, protecting strategic manufacturing or anything else to benefit American people. This is a mafia shakedown.

ASML has a large factory in Wilton. & Zeiss is further away from missiles. So they're less concerned about that.

The USA already owns the important part of ASML (the IP). ASML is a Dutch company purely at the USA's leisure.