At any rate, with the confused nature of Noachism at this moment in history my own personal policy is to be open to all, but at the same time to exercise the greatest caution.
Rabbi Aaron Lichtenstein told a story of being a young student of “The Rav” Joseph B. Soloveitchik, who was far from from anything chassidic. The Rav told his students to become familiar the Sheva Mitzvot B’nai Noach because non-Jews would be coming to them for explanations in the future.
This was around late ‘50s, early ‘60s when the Seven Laws were seldom studied at all.
So it’s not just Chabad that has changed their attitude toward teaching the Seven Laws.