"Oh, No, You Don't"

At first glance, Cuba's refusal to let the Spanish member of parliament and his wife, also an MP, enter the country might seem like one of those arbitrary decisions made customarily by a dictatorial regime. But, on a closer look, the Cuban government has probably done the right thing in keeping out someone who gives "aid and comfort" to its enemies in and outside Cuba. Given the history of the last 51 years, of conspiracies and plots against the Cuban revolution, it would be unpardonably naive to allow people to come to the island with a destabilizing agenda. No country in its right mind does that. The U.S., for example, has a long history of denying entrance to those it deems «subversive», including, writers, musicians and other intellectuals.

The Spanish government "doth [not] protest too much, methinks" because it is aware of the self-defense aspect involved in this case. Let's not forget that this is the same government that has outlawed a political party, claiming that it hasn't denounced ETA's violence, without proving that it itself is a terrorist organization. So much for the rule of law and other democratic niceties which Cuba has to observe perfectly.

Half a century has taught Cubans how to defend their revolution from its enemies, even those who come as "wolves in sheep's clothing".