"The port was under blockade, and Israel has the right to prevent MORE illegal ( according to Geneva Convention)"

Once you start to claim "Geneva Convention protection for your actions", refusing to abide by all of them just makes you a hypocrite - also probably just another hypocritical bullying armed thug.

And you are thus also claiming now that this is legitimate "War" under International Conventions, so now there is no excuse to not apply the other proper appropriate Conventions, feeding, not starving civilians 'under your control', etc. :-)

Only a hypocrite wants (needs) it both ways....