I can't help but feel that whilst there is a chance that this is a Nigerian scammer, he shouldn't instantly presume it is. He also directly warns to be wary of

I can't help but feel that whilst there is a chance that this is a Nigerian scammer, he shouldn't instantly presume it is. He also directly warns to be wary of Nigerians, without providing any reasoning that this IS a Nigerian. Even if it was, it's not really very important to the story.