They take advantage of minyanim and food, while laughing at Chabad minhagim or Chabad being the nearest religion to Judaism. Astounding that this attitude still exists, but I just witnessed it last week.
I don't find it one bit offensive. Jewish humor is famously about self deprecating. I don't consider this one bit שנאת חינם. It's when it's dressed up as philosophical, theological, or halachic arguments, when it's is thinly veiled true שנאת חינם.