Skipping all the previous discussion, they’ll keep trying to do these blockade flotillas (and variants) because its actually a pretty effective way to put pressure on the Israeli government.
Even if they get blocked in European ports or get boats sabotaged (didn’t I read about that happening? If not sorry :p) its still works very very well as a way to draw attention where they want it.
And this is leaving right/wrong out of it too, just about what seems to work.