because you simply have no grasp of the situation.
"Cuban authorities did not intervene but had earlier expelled several European politicians who planned to attend."
And that hampered the meeting? No, it didn't. Show how it was with intent to restrict the meetings and then you MIGHT have an argument, because right now, you don't.
"The delegates have called for the release of all political prisoners in Cuba.
On Saturday, they discussed projects dealing with subjects such as freedom of expression."
Once again you haven't the slightest clue. Those "political prisoners" (as the "dissidents" call them) were arrested and convicted for recieving funds and support from groups based in the US, as well as the US government. What's the problem with that? Recieving funds for political use without notifying anyone is illegal in the US (and basically any country). Further, there are established ties between the groups, and the aim of those groups is to topple the Cuban government, making those ties subversive.
Don't believe me? I found this quite quickly:
"Unlike some Cuban dissidents, Payá does not accept aid from US government sources, and opposes the US embargo."
http://en.wikipedia.org/wiki/Oswaldo_Pay%C3%A1Olswaldo Paya is a prominent dissident who has criticized those groups (who were arrested and jailed) for their connections, since it discredits the dissident movement. In case you're wondering, he's spent a total of one night in prison. Nice try.
Oh, and the meeting itself shows that freedom of expression is not significantly restricted in Cuba.
To reiterate, you really are clueless.