“The lecture was interesting, but it was much too long.” “'My sentiments exactly!'” [=I agree with you completely]
A good politician understands public 'sentiment'. [=understands the opinions held by many or most people]
His criticism of the court's decision expresses a 'sentiment' that is shared by many people.
(..) that you need to plant? We need the heir of a major corporation to dissolve his father's empire. Right there you have various political motivations... ...and anti-monopolistic sentiments and so forth. But all of that stuff, it's, um... It's really at the mercy of your subject's prejudice, you see? (..)2010 Inception