Just like how Putin couldn't travel to, say, South Africa, after a warrant was issued for his arrest. Oh wait, South Africa declined to enforce the ICC arrest warrant in that case.

I don't see this meaningfully constraining Netanyahu's foreign travel options.

It would be politically very risky for any European democracy to not enforce this arrest warrant, much more so than for South Africa or Mongolia. Israel is not popular among the public in Europe, and if a government invites him for a political visit, and don’t arrest him, that government will have to pay for that in the next election (and probably sooner, with mass demonstration and public unrest).

Now, lets talk about Putin’s visit to South Africa. So Putin was scheduled to visit a BRICS summit in South Africa despite the ICC arrest warrant. South Africa claimed they wouldn’t enforce the arrest warrant. People got very mad. South Africa, in response, declared that Putin would only participate in the summit remotely, where the arrest warrant couldn’t be enforced.

Now this was obviously a way to bypass the ICC warrant, and the stunt did not go well in the general public. In the next election the ANC, the governing party at the time, lost their parliamentary majority for the first time since South Africa became a democracy in 1994. Now South Africans had several other reasons to ditch the ANC, but this stunt certainly didn’t help.

Oh wait, South Africa is just one country.

In a great many other countries, including nearly all Western countries, the warrant is still in effect.

And even in the South African case: the government's decision was considered quite tenuous, which is why Putin cancelled his visit, in was was considered to be a major diplomatic setback at the time. So at the end of the day -- the warrant still had significant effect, and fulfilled its purpose.

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