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Why did my grandpa get strange and hostile reactions in Panama?

• While on a vacation in Panama two weeks ago, my grandpa received a variety of strange behavior/reactions. In one instance, he went to the bar at the resort and asked for a drink. The bartender gave him a dirty look, and grabbed a variety of bottles and poured it for him. When he tasted it, he said it was the worst drink he's ever had. He then went to a bar 100 feet down the beach, and ordered the same drink which he said tasted great. When we went on a tour, one of the older Panamanian women on the bus stopped my grandpa and asked him who he was and where he was from with big eyes. A more startling situation was when he walked down the beach with my brother past the resort, and three large Panamian men stopped him. They spoke Spanish so they had trouble communicating, but they made machine gun gestures and appeared hostile. He tried to convince them he was a Canadian Italian and they didn't seem to be buying it but he talked them down and fooled around by the beach for a few minutes so he would not appear worried/afraid to them. What could this have been? I have a few theories but nothing stands out as to why this would happen. He almost looks like an old Italian mobster, and he is 6'0 190 lbs. He is friendly and respectful, I'm not sure what was going on, do any of you know?

• Answer:

  Maybe he looks like like someone that is imfamous to Panama people?