Putin may want more wars than the one, oops sorry, it is a "military operation" he already has on his hands.
Apparently, some pro-Russians seperatists in Moldavia would quite like one too.
No-one else is stupid enough to "want" war, but the EU has no intention of allowing Putin to get away with walking into Ukraine and saying "I want!" (Remember what we were told as children that those who said "I want" got? According to my mother, " A smacked bottom!"
For the simple, very good reason that if we, irrespective of whether we means the EU, NATO the EU + NATO, or any other combination of countries you can think of, lets Putin get away with what he has done, he will want more. A person like Putin can only be stopped by force - reasoned argument won't cut it.
Moldavia, Poland, Romania have good cause to be worried as they are next in line and Hungary should be worried too, but seems less so.
Someone once said "Si vis pacem, para bellum" "If you want peace, prepare for war" and that is precisely what Europe is doing right now. This does not mean we want or hope that it comes, but we are not prepared to caught napping as we were in 1940.
I hope and trust that the UN can get the civilians out of Mariupol - but I doubt it. The only way the soldiers have any hope of getting out is by letting the civilians get away first, then coming out guns blazing. Many of them will be killed, but that will be their fate if the Russians get their hands on them anyhow. So either they commit suicide like the garrison of Masada, or they fight till they drop.
I may be cynical, but I very much doubt any Ukranian soldiers left in Mariupol has a hope of getting out alive, unless the steel works have a sewer system reminiscent of the one in the ghetto at Warsaw.