You can imagine anything from the US trying to steal any valuable materials or information related to lithography that it can, to actively destroying what it can't usefully steal, right? It's not like both sides would just sit there and declare foreign strategically-important companies off-limits.
It seems naive to assume Canada isn't on Trump's shopping list given he has said the exact opposite in the past, though I'm also not sure I understand what you mean/what that had to do with my comment.
That's exactly what I'm talking about too. Some combination of intelligence/military operations would almost certainly target companies like ASML during war, no? Why would you assume its assets would stay intact and remain on the Europe side?