John Cena was on the receiving end of a piledriver Tuesday from American Twitter users after his “pathetic” apology to China for referring to Taiwan as a country during a promotional spot for his new movie “F9.” SNIP Cena, speaking Mandarin, went on Chinese social media site Weibo Tuesday to apologize for calling Taiwan a country during a promotional interview for “F9,” the latest installment for the “Fast and Furious” franchise, earlier this month. SNIP “I made one mistake. I have to say something very, very, very important now. I love and respect China and Chinese people. I’m very, very...