Running a military blockade is considered a military act. The blockade was put in place by people concerned about Israel's security; it is not much of a stretch to say that trying to damage the blockade by busting through it is an act of war against Israel's military efforts. Here in the U.S., we have Congressmen who have disagreed with the decision to go to war in Iraq. To the best of my knowledge, none of those dissenting Congressmen have traveled to Iraq to actively sabotage the U.S. military effort there.
Week of floods kills 22 in Vietnam (DPA)
from the article: Interior Minister seeks to strip Israeli Arab MK of citizenship