I think we saw a little of this with The Mandalorian. In the episodes where we first meet Cara Dune, and she talks about being a "dropper" shock troop. It definitely gives you a much grittier, Machiavellian view of the rebellion, and it seems like the Imperials view droppers as savages whose conduct is beyond the pale.

Also, in the episode where she and Mando are (kidnapped/stowaway whatever, can't quite remember) on the Imperial shuttle. The Imperial pilot makes it clear that his hatred of the rebellion is deep, personal, and 'moral'. "Do you have any idea how many millions of people were on that battle station?" Not that he has exactly seized the moral high ground, working for the Empire, but I definitely saw that as a "rebellion ~ al Qaeda" moment.