NORML article

I read a really interesting and kind of scary article about a drug raid at a house in Missouri. I didn't believe the article until I actually saw the video. The article was about a man that was in possession of enough marijuana for a misdemeanor (an ounce) and had his home raided. Also about the family losing custody of their kid because of child endangerment.
From what I saw in the video it looked to me like the police that were busting into the house yelling and then shooting the families two dogs right in front of the child should be considered child endangerment instead of possession of a harmless plant. The way the cops acted and treated the man was just really scary. They treated the man like he had just killed somebody. Like he was a criminal.
It's a truly terrifying thought that the DEA has the power to invade someones home and shoot and kill someones pets if they know someone is in possession of marijuana, even if it's only an ounce.
This is just getting more and more ridiculous. What is really accomplished by the DEA when stuff like this is done? They put one more person behind bars or in a cell for the night, but all for what? A harmless plant. Why not just legalize and let people smoke.