They're literally going to point to anything the EU does and say "Oh! Gotta pull out of NATO now!" They'll even make up shit that EU didn't do (probably like this fake ass threat letter) as excuse.
They intend to get out if they can, unless they get unilateral control, in order to strengthen Russia.
They should tell Trump that if he tries to fuck around, they'll all immediately start trading oil in Euros. Maybe just do that anyway as a fuck you.