Commentaries:
Flee from idolatry. Lust, fornication, tempting Christ, murmuring—all of these are sin that lead to idolatry.
John W. Ritenbaugh
Passover and I Corinthians 10
God does care how we worship Him; He gives specific commands about how He wants to be glorified according to His standards and not our own. It does matter whether or not we share in the celebration of this world's pagan religious holidays. Though the Bible—the Word of God—makes no direct references to New Year's Eve, Lent, Easter, Halloween, or Christmas, the origins of these pagan holidays are mentioned as being abominations to God.
Martin G. Collins
Pagan Holidays
This passage appears in the midst of an epistle detailing the problems of a tumultuous congregation. Paul draws on the experiences of Israel in the wilderness as examples to us. He concludes by telling them, despite what manner of sin each individual was involved in, to turn their attention to overcoming idolatry. In others words, idolatry sat at the foundation and was ultimately the cause of whatever their sin happened to be.
John W. Ritenbaugh
The First Commandment