Not a fan of this guy, but he's absolutely right about this one. Assuming the US wouldn't actively aid Russia, which isn't exactly guaranteed.
Russia only attacked Ukraine, because it was weak, vulnerable, and alone. None of these are true for the EU. Attacking any EU country would be suicide.
NATO is worthless, because it only does what its leader says. It's not a reliable security guarantee, and it's precisely why we're even talking about this to begin with.
As opposed to NATO Article 5 only requiring members to provide support thay they deem necessary, Article 42(7) of the Treaty on European Union requires all members states to 'aid and assist it by all the means in their power'.
https://eur-lex.europa.eu/EN/legal-content/glossary/mutual-defence-clause.html
“Even without the US it’s still overwhelming, and I haven’t checked recently how many F-35s and JASSMs and all the deep-strike capabilities we have.”
Who's to say the US wouldn't order Lockheed Martin to stop all software updates for European F-35s, basically turning them into more expensive F-16s?