The blockades are for weapons, not food.

The tunnels are for smuggling weapons, not food.

Wrong both times, I'm afraid.

The blockade covers far more than weapons, and has reduced food supplies to a trickle, a level that is totally inadequate to meet the needs of the population of Gaza.

And arms and stuff that can be used to make arms have never been more than a relatively small part of what has been brought in through the tunnels.

>I>Food, medicine, fuel, parts for water and sanitation systems, fertiliser, plastic sheeting, phones, paper, glue, shoes and even teacups are no longer getting through in sufficient quantities or at all. According to Oxfam only 137 trucks of food were allowed into Gaza in November. This means that an average of 4.6 trucks per day entered the strip compared to an average of 123 in October this year and 564 in December 2005.

That comes from a page by the San Francisco Gray Panthers - Effects of Israeli blockade of Gaza

And note, those figures relate to a period during which the earlier ceasefire was still supposed to be in operation - a ceasefire largely based on a promise by Israel not to impose a blockade on essential supplies.