That's not just emotive language, it's insulting and degrading. The GDPR is a multi-party, supranational, democratically legitimized regulation. Also, I haven't seen a single PR campaign about the GDPR, and I'm from "over there". The grandparent is not arguing objectively nor purely based on facts.

Huh? It’s not meant to be insulting, nor could I find any reference in any culture in which it would be considered an insult. It simply means that all of you from the EU seem to say the same things about GDPR - that it’s wonderful, has no downsides, that our new self-declared privacy overlords will be kind and benevolent, etc. It’s like there is one person behind all of your accounts, and that person is a big fan of it. That’s why I used the non-derogatory term “party line”.

See https://www.merriam-webster.com/dictionary/party%20line

"Party line" implies that it's a position everyone's obliged to take as part of being a party member, rather than something freely and independently reached.

And I suspect the main driver for GDPR cheering is that nothing else has been done about so many other privacy incidents. We can look back on HN and find such things as the massive Equifax leak (the next one of those is going to be interesting!) and the smart TVs that exfiltrate a list of all files on any media inserted.

That is in turn called a strawman. And there are many different opinions in the EU regarding the GDPR. I think HN users are non-representative of the general public since they tend to be a lot more concerned about privacy issues - and that no just the users from the EU. But in general, the EU does seem overall more positive towards regulation of business than Americans.