The actually officers are put into a tough situation in scenarios like this. I don't know how it works, but I'm assuming that they can't just tell their boss, "Nah, I'm not really into doing raids." They are told to do a raid, then, they pretty much have to treat it like it is a big deal because there is always the chance that it WILL be a big deal, and thinking twice about niceties and stuff could get them or their buds killed. Kind of like how it doesn't matter if you agree with the war you're in, you still protect your fellow soldiers however you can.

The article DID say that the SWAT team was all volunteer (which was a TERRIBLE excuse for the tardiness of the warrant by the way), but still, you do what you are told in order to keep your job. Of course that doesn't mean that there aren't guys who are jerks like people are describing. I'd guess the quiet ones are the ones who wouldn't go about it that way if given the choice.