Demagogy at its finest, to be sure.
Let's begin with the lesson.
The military is there not just to "kill" people. It's there to deal with national emergencies, lend humanitarian aid, and a lot of other things that you conveniently choose to ignore for the sake of your little tendencious rant.
For those schoolteachers, nurses and farmers to do their thing, there must be somebody that provides the basic conditions of security and stability. Guess who those people are - the soldiers!
In case you have forgotten to read your history books, time has proven that nations without a military are nothing but prey to the frequent outbursts of collective violence that mankind is so prone to. So far, there isn't a reliable way to prevent these outbursts, so the military will have to do for the time being.
The threat of military force is the only thing that maintains the comfortable society you live off from those who would see it burn. A society that was built, largely, by means of military force. If you'd prefer to go live in a cave, be my guest. But you won't for it's so much better to play Marx from your comfy chair in front of your computer.
Last, but not least, the military are responsible for safeguarding those freedoms you price so much, that were paid for in blood. And I'm not talking about outside threats, here.
Thus concludes our lesson in "World and Historical facts applied to everyday life"!
See you next sunday!