This is very interesting, but it lacks (IMO) more references. As it is written, it asks us for trusting the narration (which I am tempted to do) but it does no

This is very interesting, but it lacks (IMO) more references. As it is written, it asks us for trusting the narration (which I am tempted to do) but it does not give much in support to this narration. For example can we have some artifact in support to the claim that the Israeli Intelligence has informed the Spanish Intelligence Agency and the Spanish Homeland Department?