You are denying reality. ANY law on earth is enforced by guns.
The reason your country can suggest laws in the EU is because there is a balance of power in Europe, and no one country can impose its will on the others. If any one country had overwhelming power, it could enact any law it wanted. The charade about "consensus" is a PR campaign. It lets the strong countries pretend they are playing nice, and it lets the weaker countries retain self-respect by pretending they are "consenting" to the established order.
The situation in Ukraine is a case in point. When a strong country wants something, it takes it, and all the laws and conventions can go hang. If you think that, under the right circumstances, such a thing cannot happen in Western Europe, you are living in a fantasy world.
On the ICC, the reason any country can opt out is because the US has allowed it to be an option. If the US declared that ICC rulings are akin to UNSC resolutions, enforced by military might, then no country could reject ICC rulings.
To sum it up, we are going in circles. You keep saying that the actions of Britain, Jews and Israel were "legal" and I am saying that "legal" is just a fancy word for "might is right".
The guy with the biggest guns (and the biggest checkbook) writes the rules.
P.S. I will give you another example.
Say I am a strong country X who captures Sweden. I now decide to allow millions of Africans to come and colonize Stockholm, kicking out most Swedes.
How are my actions any different to what Britain did in Palestine?
If Britain's actions were "legal", then so are mine. If mine are "illegal", then so were Britain's.
You are saying that all laws are created due to Military power which is NOT the case.
The US has certainly the power to overthrow most conventions but its inner values
will make it prefer a consensus agreement over its own decision.
This is still in development. George H. W. Bush did not attack Iraq alone,
He sought legality in the UN.
In the EU, the countries have voluntarily given EU jurisdiction over certain issues.
EU "constitution" gives every member a veto. They do not need to consent.
Each country votes for their government and thus their representatives to the EU.
Thus all laws are passed without military power being involved.
Enforcements of laws are through state power in the form of Police.
Democracy itself is upheld through force of the Police/Armed forces.
To claim that laws are CREATED through military power is still absurd.
The fact that some things may happen due to military power, does not make it a General Rule.
A country which has veto power can break any International Law, without beeing
criticized in the SC, but will have to handle the reaction of its peers, which Russia is now finding out.
Their power cannot be used to CREATE International Law.
ALL countries have a choice in which conventions they want to sign, and this predates the US.
If somone conquers Sweden, it would become an occupied territory, and the Geneva Conventions normally apply
and they may not transfer their own citizens into Sweden, also they may not transfer Swedes out of Sweden permanently. Swedes, like Arabs in the British Mandate are allowed to move out.
If they do that before the area is occupied, then they do not have the right to come back.
If they do it after the area has been occupied, they do.
There is no law that says that country X cannot let non-X citizens immigrate to Sweden after occupation starts.
If country X has not signed the Geneva convention, they can legally both import Africans and kick-out Swedes.
There would likely be world protests anyway.
If Sweden, in a treaty signs away part or whole territory to country X, then they can import as many Africans as they want.
As for kick-out, Arabs were not kicked-out, they left because it was in their perceived interest.