Attitude/philosophy of Rabbis and Cantors

What has been the attitude/philosophy of Rabbis and Cantors throughout the centuries, towards the use of non-Jewish melodies for Jewish purposes? (Jewish liturgy, Jewish events, etc.)
(The term for borrowing a melody and replacing the original text with another text is Contrafactum; plural: Contrafacta).
1) There are 4 sources (listed below) available as PDF’s on eCommons and the class website.
2) The introduction to your paper should be about the attitude/philosophy of rabbis towards the use of non-Jewish melodies IN GENERAL (All rabbis disapproved?
Some did some didn’t? What were their reasons?)
3) In the main part of the paper, give 10 examples of different individual Rabbis (including cantors) and their attitude/philosophy towards the use of non-Jewish melodies. Make sure to list only those who talk about the use of non-Jewish melodies! So you really need to pick them out (especially in chapter 3 "Music and Religion" from the book Jewish Musical Traditions - there are many rabbis mentioned there who talk about all kinds of matters which do not belong in our paper...)
4) For each Rabbi - write what his opinion was with regard to the use of non-Jewish melodies (Did he approve it? Was he opposed to it? Give his reasoning whenever possible)
5) Make sure your intro and conclusion are about the use of non-Jewish melodies (nothing else - not the use of instruments, or the history of Jewish liturgical music, etc.)
6) NOTE: Israel Najara mentioned in the book Let jasmine rain down, was a rabbi...
7) The pages from Idelsohn’s book cover Medieval Germany.