NATO is not at war with Russia.

World war 3 is going to be a total downer for everyone, most countries will want to avoid it, or at least try not to be the one to start it.

Not to mention the president of a country travels as a diplomat. Arresting diplomats is something that's frowned upon internationally.

Arresting the president of a country, or kidnapping the president of a country, is a pretty clear declaration of war.

Let's say by some miracle war doesn't immediately break out, well the country you've just pissed off has a bunch of hostages immediately available, all of your diplomats and citizens in their borders. As much as we want to talk about rule of law, at the international level between countries it's all about capabilities.

I think it's not necessarily whether countries would or wouldn't arrest him. It's more, if he's invited to a summit or otherwise making travel arraignments, he gets confirmation they don't intend to arrest him. If a country doesn't commit to not arresting him, he just wouldn't go. If a country says they won't arrest him, then arrest him, it calls into question that country's diplomacy.

I am fully pro ukraine.

Because if they arrest him, there could easily be bloodshed outside of Ukraine. As much as nato countries are happy to support Ukraine currently, they aren't interested in inviting conflict to their own borders

As a Brazillian, I think it would probably be good if we were at NATO, but we're not.

Maybe it's like Hitler and they don't want Putin being replaced by someone competent at war.

"Never interrupt your enemy when he is making a mistake".

That's for domestic crimes. International crimes like genocide, torture and other war crimes have no functional immunity for a head of state. Pinochet for example.

That's why Putin didn't go to South Africa.

That works too, although I'd prefer to see him rot in jail. Sudden death is too quick and easy for people who have done what he has.

Basically Weekend at Putin's

Zombie Putin?