I am not talking about 'drugs,' although some no doubt use them for pagan purposes.
Specifically, see Deuteronomy chapter 7, especially the last verses. Likewise, all of chapter 12. And ALL the places where we/they are told, "do NOT ask, how did these [pagans] worship their gods," and then go and do likewise. (Which is exactly what the RCC did do, to "christianize" the pagan not-so-holy days.)
And then specifically, Ezekiel chapter 22, and 44, where we see the contrasts. A priest which did, and one which FAILED, to "teach my people the difference," between the qadosh (set apart, rendered 'holy') and profane, and the tahor and tamim (clean, and unclean, or abomination.)
To 'worship' Him as the pagans did their fake gods, He "hates." (Note in Exodus where even Aaron fell for that BS, and made the 'eglah masekah' or calf image.) We are to (repeatedly, but Ex. 23:24 is but one example) NOT 'bow down,' or worship the fakes, but "utterly overthrow" them, burn down their asherim, "break in pieces" their pillars, etc - literally OVER and over. The examples are overwhelming, and "Legion."
And they permeate more xtian 'tradition' than most will want to admit.
PS> For a real eye-opener, then go read the story in Ezekiel chapters 8 through 9, about the "angel with the inkhorn," and what happens with that paganism. Which should sound VERY familiar, this time of year... (like, "40 days of weeping for Tammuz")