Every bank should make certain it can identify all non resident alien accounts. It would be reasonable to classify them all as high risk (subject to higher levels of monitoring), particularly those belonging to individuals from high risk countries or countries associated with certain money laundering typologies; e.g. Black Market Peso Exchange.
However, it not logical to consider accounts as high risk just becasue they used a certain type of ID. If a bank considers the Matricula to be of questionable value, it makes no sense that they accepted it at all.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.