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I mean NATO is already involved with NATO countries supplying arms. The UK foreign secretary has even said that people have her full support if they want to go and fight for Ukraine (which is beyond irresponsible).

> if they want to go and fight for Ukraine (which is beyond irresponsible)

Why irresponsible? My take on it was that message was aimed at Ukrainians living in the UK who wanted to go and fight. Your average Brit isn't even going to humour that idea.

Could sanctions get bad enough for Russia to retaliate?

> The West is not going to risk the Apocalypse for Ukraine.

If Putin is launching nukes, it has nothing to do with Ukraine anymore. The choices are “do we let a madman play with nukes or not?" I think the answer is pretty obvious.