It wasn't that Tony didn't like Colombians, he was scared of them. He was scared of them because they had a lot to protect. Cocaine in it's purest form consists of resources that come mostly out of columbia, anything else added to it is just junk.. Tony didn't like Italians because he didn't want to pay them taxes or tribute or use them to help him clean his money. Tony was just a hungry little runt who needed to just be quiet and go away.