If you look at it at the individual level, of course it's a tragedy.
At the systematic level though, big change historically almost always includes death, and at the end people everywhere celebrate the successful revolution with very little thought to those sacrificed to get it.
A person killing another person. People will mourn him. I guarantee someone is crying over this, a child, a parent, a lover. If you can't see that side of it at all you need to take a step back and think about your humanity.
But as a system... It's a different story. Sometimes things have to break before change happens, and afterward, people are likely to just think about it in terms of a beneficial change, not the people who didn't survive the conflict.