Learn to read.
The article said the Police acted after receiving a "reliable tip". Note the quotations.
You said Given the information they had,
Learn to be less rude.
For example, if the information is that the suspect is armed and dangerous, even if it turns out later that he really wasn't, the police going in MUST treat the arrest as though he is. They can't afford to be second guessing on how good the tip was when they're in the process.
In this case, the cops on the ground going in had information that the guy had illegal weapons and possibly explosives. With that as a given, I thought they acted appropriately.
I'm a nice guy to people who don't put words in my mouth to distort the point I'm making.