It came from this article by none other than the infamous J.A. Adande:

http://sports.espn.go.com/nba/playoffs/2009/columns/story?columnist=adande_ja&page=RocketsLakers-090508

Here's what Fisher says:

""It's playoff basketball," Lakers guard Derek Fisher said. "You have to be mentally tough; you have to be physically tough. I don't think there are many plays where guys are intentionally trying to harm guys or injure guys or take guys out"

I guess tackling Scola like he a strong safety in the open field doesn't constitute "intentionally trying to harm guys"