The cancel mob has come for left-wing comedian Randy Rainbow, who is scrambling to apologize for past tweets in which he made ethnic and transgender jokes. Rainbow is a darling among the left-wing political and cultural elite for his anti-Trump YouTube videos, as well as his recent “Kamala!” song that went viral thanks to retweets from Hollywood actors Ben Stiller, Eric McCormack, and Mark Hamill. Rainbow’s old tweets resurfaced thanks to a spreadsheet circulating online that catalogues jokes mocking blacks, Latinos, and Asians. In several jokes, he used the word “tranny” to refer to transgender individuals. The word, which was...