Two quick examples would be the left party consider the secret mass surveillance by government entities to be wrong on multiple levels and is continuously criticising the government for it. Another would be that the same group of parties consider the government being too slow to implement carbon taxation and other measures to prevent further damages due to climate change.
Those two words are verbatim what our right-wing parties use to describe the EU as a whole, especially when arguing why we should do our own Brexit and leave the union because we are better on our own.
But that's the phraseology. You specifically mentioned reasons / attitudes.
If this is another "dog whistle" argument, I think you need far more evidence before you smear another user what you assume their motivations are; It's possible to use terminology borrowed from right-wing parties, language is free to use - and ThalesX has explicitly stated their position.