Cuban here (and actually living in Cuba, if that's even important or relevant.) This whole thing was puzzling for me from the get go, as I never thought our government could do something like this. If they wanted to freeze back relations, it would be simpler to just say "F* off!" (and believe me, they can dream up a thousand somewhat-plausible explanations for that decision.)

It doesn't make sense from an Intelligence o Intelligence Gathering point of view. They have cheaper and better ways (like... actual people?), so I don't think that this wasn't some kind of (Cuban) intelligence equipment malfunction. Plus, from the reports it seems that the presumed attacks were taking place on diplomatic personnel residences and hotel rooms. In that environment the attackers do not have much control: what if there's an asset there? what if there's a child?

But what really makes me to think that this was not a Cuban operation or attack, is that Canadian personnel were also reported to be affected. That's a big huge no-no.

Since this whole thing was interesting for me, I have asked several people on their opinions. People from all walks of life and political leanings. Most of them just told me that they did not think it was Cuban behind the attacks, if there were attacks at all. The more cautious just waved off with "We need more information." Not one person, no matter where they stand, thinks we actually did this.

(Sorry for my English.)