How Serious Is Sarkashi (committing Sins In Abundance)?
It is denial of truth and show of pride and vanity in front of God, which is the same sin committed by Satan. Following portion of Meezan has discussed this point: https://www.javedahmedghamidi.org/#!/mizan/5aa6a4315e891e8f44a45788?chapterNo=3&subChapterNo=2&subChsecNo=9&lang=ur