Glad we are on the same page, because yes, as you pointed out, it literally says here in plaintext that it was NATO Allies that activated it, not the United States.

Is the US not one of those "NATO allies"?

I'm not clear on how a semantic quibble that amounts to "Spain and the rest of Europe proactively affirmed their Article 5 obligations to the US" helps your case here. You have, if anything, effectively demonstrated Spain's commitment to the agreement.