in what Europe are you living sorry? The only one outspoken against the war have been the Spanish. UK, Italy and Germany are on it - offering logistical support and everything the US needs.
UK is bossed around by the US, ever since WW2. We don't have many choices that don't involve the USA inflicting revenge. They're bullies
It's like criticising an abused wife with no job no money and not many friends for not just leaving immediately, and the husband is rich, powerful and knows everyone