Its very common to see Gaza flags in Spain.

Edit: Palestine flags of course.

I only stopped there for transit on a flight to Mexico. Just before boarding my flight I was told that I need a visa for the US, which is extremely weird because normally airports have transit zones where you don’t need any visa. But apparently the US is special, so you actually have to enter the country before going right back into the airport. This nonsense made me miss my flight.

Also I remember in the airport there was a security guard doing nothing but shouting nonstop that it’s not allowed to carry water. Why not simply put up a sign?