Why? Maybe its because the stockpile of missiles by Hamas would become an existential threat to Israel into the future and had to be minimized. The conflict between Israel and Hamas is simply that of Hamas amassing weapons to be used on Israel. No more no less. The 'blockaid' revolves around weopens. Period. No threat to Israeli security, no block-aid.
Turkish military denies hitting civilians in airstrikes targeting PKK militants (Reuters)
from the article: Why did Israel kill Jabari?