>>I think this type of behavior was common in conversos because their lives depended on appearing Catholic.<<
Judaism in historic Quebec wasn't as hidden and secret as you *might* think.http://www.jewishvirtuallibrary.org/jsource/vjw/Quebec.htmlhttp://jgs-montreal.org/quebec-research.html
There's a massive amount of research territory to cover in-between an observation in the 20th Century to the Spanish Inquisition.
This is doctoral thesis level research, and requires a number of sophisticated skill sets, specifically (but not limited to in the least) the ability to read text in several languages, even "old English" is a challenge for most. Finding the original source data is one thing, comprehending and having the skill to evaluate it, is quite another.
"I've read that my first ancestor in Canada, Girard, was buried one day after his death"
In the 17th-18th Century the vast majority of New France inhabitants were buried the day after death. This practice changed, lengthening to two days and then to three in the mid-19th and into the 20th Centuries. The Quebec Catholic Church (and Drouin Collection) records are filled with specific detail and overwhelming evidence to support this statement.