Photo Illustration by Luis G. Rendon/The Daily Beast/TwitterIf you mourn the loss of Columbus Day, want less focus on the evils of slavery, and think climate change is overrated, PragerU is for you.The brainchild of conservative talk show host Dennis Prager, its catchy videos just won approval from the Florida Board of Education for use in all the state’s K-12 public schools, making Florida the first of what the nonprofit PragerU expects will be more red state adoptions of its rightwing ideology