[halflife]

If you decide that a law is unlawful you can’t act on it, you need to go to courts, which have been tried and dismissed since laws are not a matter of popular opinion, but a matter of informed and professional opinion.

You can get 2 billion people to say that the blockade is illegal but it doesn’t make it so.

[NomDePlum]

Likewise Israel saying it is legal doesn't make it so.

Given the number of international laws it has broken and that it refuses to abide by, or deliberately avoids, decisions by international courts it's slightly more complicated than going to court

[halflife]

No, the fact that the UN has acknowledged it as legal makes it legal.

[NomDePlum]

In 2010 under specific circumstances, which have clearly changed.

I've outlined the rationale above. So I wouldn't agree with your conclusion.

[halflife]

If the situation has changed, why won’t anyone try to challenge the decision in court?