Cops this evening arrested an Occupy Wall Street protester for allegedly threatening to throw Molotov cocktails at Macy’s tomorrow during the group’s city-wide demonstration. “On the 17th, we going to burn New York City to the f-cking ground,” Nkrumah Tinsley, 29, shouted Tuesday amongst a crowd of his fellow demonstrators, cops said. Tinsley was also quoted making a similar quote in today’s Metro newspaper. “In a few days they’re going to see what a Molotov cocktail can do to Macy’s,” Tinsley also allegedly vowed, according to a video posted on YouTube. “They got guns! We got bottles!” Tinsley was arrested...