Marvin,
You're confusing me a bit now. The quote is not offered in relation to "transfusion practices in modern times". The term "modern times" is only used once in the entire brief, in the "Summary of Argument" section. No judge could possibly think that every part of the brief is supposed to be directly relevant to "transfusion practices in modern times" because that term is mentioned once in the summary, any more than anyone would think that every sentence in the brief is supposed to support it being prohibited "under the Mosaic Law" because that phrase also is used in the summary. (A phrase that also indicates that the entire brief is not going to focus on "modern times.")
Rather than purporting to have anything to do with modern times, the Santinelli quote is under the subheading "Commentary on the Christian probibition of blood." I think that your points (1) and (2) above are quite obvious, and that no intelligent person would possibly read the brief to mean that Santinelli supported the WTS's theology or that it relates to modern times. They're tracing the history of blood transfusions in the section in question, albeit in the light most favorable to their position, which is fair game. Do you really think any members of the Florida Supreme Court believe that blood transfusions are administered the same way in 1668 (a date listed directly under the quote) as they are now? In my humble opinion, you would have to take the Justices for fools to be "misled" in the manner suggested.
As BluesBrother notes, this is all background as well. That's why the subheading is called "commentary". Even if they could prove that the Pope, 100 monks and a carriage full of nuns all taught that blood transfusions were unscriptural in 1668, the Court could not constitutionally factor that into their decision. Thanks once again for sharing an interesting read.
-C