I do laud Chabad’s strictness with regards to eruvim. And, you are right that–on average–Lubavitchers are more likely to be machmir here than American Litvaks. Just one fact check: you said it’s more normal in the Chassidish world to be machmir on eruvin. This is not true. Most Chassidim have a mesora to be meikel in this halachah. Even to the degree that many hold by the Brooklyn eruvin.
Yeah. I meant the other things. Eiruvin happen to be one of the things that the Chassidisher happened to be mote lenient about. Although I’ve seen plenty Litvish people rely on Eiruvin.