They can’t tariff Spain without tariffing the entire EU. They’re part of the same trade bloc.
Spain is being reconquered anyway 2.5 million Muslims (a large number given that their population size).
Are you sure about that? My understanding is that Trump wanted individual agreements agreements between countries and not "blocks".
I just don't know, but I don't see the EU stepping up to defend Spain since all of them are supporting full NATO funding. They will not be happy picking up Spain's bar tab.