With such a big topic, it's never an either/or when it comes to attitudes towards warfare. While Early Modern princes did celebrate martial victories, courtly culture also celebrated their roles as peacemakers.

Since you're talking about Shakespeare, check out his lines on war. There's glorification present, but also a sense that war is a folly and a violent waste. For example, when Henry V goes incognito among his men, he engages in a debate with a soldier Michael Williams who expresses skepticism about the king's motives. One of the most famous lines of Williams's is "There are few die well that die in a battle."

http://en.wikiquote.org/wiki/William_Shakespeare_quotes_about_war