US President Donald Trump said Friday that Russia had agreed to immediately supply more than 300,000 tonnes of diesel to US and global markets in an effort to cut fuel prices before November’s midterm elections. The move marks a stunning change of policy after the US and its allies hit Russia with waves of sanctions over its invasion of Ukraine.
I think some Europeans (certainly in my country of the UK) are still quite naive about Trump. Maybe they think “sure, Trump can be a bad person to some countries, but he’d never be a bad person to MY country”
One day, whoever is in the White House will choose to act immorally towards a particular European country (whether it’s Ukraine, or the UK, or Poland, or Finland, or whoever) and that European country, on its own, won’t be able to do much about it
TLDR: If Europe unites, it protects Europe from potentially hostile big powers, such as the US, China, Russia. A big entity like the EU has more leverage to say “no” than any individual EU country does.