@Magdiel I know you are joking, considering the vast amount of reliance that the kashrus industry has on Chabad, but I know of Roshei Yeshivos that won’t drink wine with a Lubavitch Rav HaMachshir, and many more who would rather daven b’yechidus than in a Beis Chabad.
That being said, I hold of the tzad that if you can see that a person looks and talks like a Yiras HaShem, you can rely on them for things in times of necessity. So I’m not going to interrogate every Shaliach to see if they hang a picture of a man up on the Mizrach Vant, I’m just going to assume that they are frum.
All that aside, just because the frum oilom has major issues with Lubavitch haskofo doesn’t mean we hold of them as not frum.