It was a botanical bloodbath. A “disturbed” cane-wielding man decapitated dozens of tulips that famously line Park Avenue during a daylight rampage, neighbors said, punishing the Upper East Side “for its wealth and its beauty.”  The Tulip Terminator’s anger was in full bloom the morning of April 18 when he used a cane to whack away at two separate flower beds between East 76th and East 77th streets, according to Amy Sheldon, the executive director of The Fund for Park Avenue. A “disturbed” businessman hacked two beds of tulips on Park Avenue last Saturday. J.C. Rice for NY Post Red, white and blue tulips were planted this year in honor of America’s 250th birthday. J.C. Rice for NY Post “I don’t understand it. I don’t know why somebody would do it,” said Sheldon, whose organization oversees the annual plantings. “The tulips are just beautiful. They are harmless. They have no impact on anybody other than making them happy and smile. So I can’t imagine why someone would do something like this.…