The Rebbe on the Greeks

"They would have allowed the Jews to study Torah and observe mitzvos — the mishpatim and the eduyos — so long as they did not mention that the Torah was G‑d’s and that the mitzvos were “the decrees of His will.”  Hayom Yom: Tackling Life's Tasks - 2 Teves, Day 7 of Chanukah

I can think of "Orthodox" groups that seem to approach life this way. They'll study Torah all day long but mention G-d, hardly ever.