What's so funny bout peace love and understanding?

That it can and does exist exclusive of religion, god or gods, material possessions and money.

Funny that so many people believe it's possible enmasse.

the belief in the reality and how it accomplishes anything in the presence.

Neighbors' envy, owners pride. (mentioned just in light spirits)

You can have Love and understanding but the way things are going someone will most likely shoot you.