I'll try and come back to some of the other points later.
But "solidarity" as a response, as I see it, just isn't going to change the fact that are gunboats in the med. I do agree that as a response it can help with things like how existing immigrants are recieved, and accepted, and so on. If the theory is that it's part of a build up to some kind of revolution, which then changes the gunboats-in-the-med situation through non-parliamentary mechanisms - I simply don't see that as plausible. It's not going to happen. Of course, maybe I will be proven wrong. But because I don't believe that's going to ever happen, I resort to the unsatisfactory beaurocratic methods as a plausible means to make things less bad.