Regarding previous Israeli enforcements of the blockade, you may think they were heavy handed, but there has never been shooting or deaths apart from this one ship.
Explanation?
Israel certainly gained nothing and has been damaged by it.
Is it significant that families of some of the killed have stated that they wanted to be martyred?

You have said I am in no position to describe others as partisan.
I am suspicious of the statements of both sides and try to judge by their actions not their words.

How do you know that there are witheld videos?
Why should we not believe the evidence visible in the images that have appeared?