I would say none of these but Indians are the most friendly ones as they can strike conversation with anyone in the world & come out with a smile at the end of it being like they know the other person since ages. i have never seen such talent in people from any other country!!
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Countries mentioned have invasion attitude and are shrewd business people. For them only money and business matters a lot than friendship. A few references are Maruti, Union Carbide, Volkswagon, British rule & google china., In friendship give and take policy need to find importance. Considering this for Indians U.A.E. is the most friendly nation to do business. For other countries India is the most friendly nation.