The Spanish newspaper El País is taking it pretty seriously:
Un activista anti gobierno se estrella contra un edificio federal en Tejas
Un ingeniero de sistemas informáticos manifestó este martes su furia contra el Estado suicidándose con una avioneta lanzada contra un edificio de la agencia tributaria en Austin (Tejas), donde trabajaban 200 empleados federales.
Translation: “An anti-government activist crashes into a federal building in Texas: an IT engineer demonstrated his rage against the government by killing himself with a small plane launched into the IRS building in Austin (Texas) where 200 federal employees worked.”
The Spanish have a long history of dealing with domestic terrorism. But I’m not sure that history is what prompted this language.