Pro-Israel responses rarely get published here. I'll try to respond . The blockade is necessary to keep out weapons aimed at Israeli civilians. The fact that the attck was in international waters is not very relevant, since they were on their way to Gaza.
U.S. says working on initiative to de-escalate Syria fighting, with focus on Aleppo (Reuters)
from the article: U.S.: UN council rushing to blame Israel for Gaza flotilla deaths