Murder on the Orient Express Foreignness and 'the Other' Quotes

How we cite our quotes: (Part.Chapter.Paragraph)

Quote #10

"I have the little idea, my friend, that this is a crime very carefully planned and staged. It is a far-sighted, long-headed crime. It is not – how shall I express it? – a Latin crime. It is a crime that shows traces of a cool, resourceful, deliberate brain – I think an Anglo-Saxon brain." (2.10.54)

Poirot's notion that only an Anglo-Saxon brain is cool and resourceful is dated and backwards. Why is his assumption a problem?

Quote #11

"I like to see an angry Englishman," said Poirot. "They are very amusing. The more emotional they feel the less command they have of language." (3.7.50)

Poirot uses stereotypes about the English to work up Colonel Arbuthnot and Mary Debenham. Why is this a good angle for getting information out of the Colonel?

Quote #12

"So, you see, sir, he couldn't have done it. Tonio may be a foreigner, sir, but he's a very gentle creature – not like those nasty murdering Italians one reads about." (3.8.53)

Masterman rushes to Antonio's defense once he realizes that the stereotype of the bloodthirsty Italian may cast suspicion upon the man.