Some years ago on YouTube there was something called the "blasphemy challenge." What is this?
People were challenged to submit videos in which they recorded themselves blaspheming or denying the existence of the Holy Spirit.
The so-called “Blasphemy Challenge” is a misguided attempt by some unbelievers to commit the unforgivable sin—i.e., blaspheming the Holy Spirit (Matt. 12:32) People were encouraged to submit videos in which they recorded themselves blaspheming or denying the existence of the Holy Spirit. Obviously, this is a foolish endeavor.
Some Protestant Christians, who anticipated being raptured to heaven and wanted to have their pets cared for in their absence, cooperated with nonbelievers in taking up this challenge so as to ensure ongoing temporal care for their canines and/or other pets. Such actions are obviously contrary to Christ’s teaching and ironically place the good of mere animals over human beings, i.e., those who are made in the image and likeness of God (see Genesis 1:26-27). In addition, the rapture is not biblical, as can be read about here and here,
Finally, the unforgivable sin cannot be committed by a mere utterance, we are happy to report, thanks to God’s great mercy. The only real unforgivable sin is final impenitence (CCC 1864).