What do the three pronouns refer to?

The passage below is the last passage of The Library: A Fragile History by Andrew Pettegree.

The complete Quintilian was the greatest treasure from a substantial haul: Bracciolini and his friends also retrieved works by a dozen other classical writers. The foray at St Gallen would be the first of many for Bracciolini, as he talked his way into monasteries and copied or bought books from their libraries. He, like other Italian humanists, took advantage of the natural generosity of monks sharing their treasures with erudite visitors, often in ways that were unscrupulous or downright dishonest... Although the monks north of the Alps were, in the minds of the book hunters, the most offensive of a disdained breed, they also heaped opprobrium upon their Italian compatriots, who dishonoured the traditions of Rome by their ignorance. When Bracciolini learned that a humanist collector had bequeathed his library of Greek books to a monastery, he derided him for giving such prized items to ‘those two-legged donkeys who do not even know a word of Latin’. He also complained about the ‘barbarians’ at Monte Cassino, who according to him were only interested in money rather than in providing him access to their text of Julius Frontinus. Even those monks who themselves had an interest in classical writings were not worthy of Bracciolini’s attention, unless they were like the monk from Cluny, who was helping Bracciolini acquire a copy of Tertullian from his monastery and therefore did ‘not seem in the least bad’. However, he was still a monk.

I want to ask what the three underlined pronouns refer to, and what ‘their Italian compatriots’ refers to.

First, ‘they’ seems to refer to ‘the monks north of the Alps’. (Am I right?)

Second, ‘their’ in ‘their Italian compatriots’ seems to refer to ‘the monks north of the Alps’. (Am I right?)

Third, ‘their Italian compatriots’ seems to refer to ‘book hunters’. (Am I right?)

But even if I’m right. I still have an additional question. Why are the book hunters the Italian compatriots of the monks north of the Alps?

Last, ‘their’ in ‘their ignorance’ seems to refer to ‘book hunters’. (Am I right?)

Thanks in advance.