Who said it was a court of law? You're the one who keeps using the word intent, not me. That's not part of the definition of a unsportsmanlike foul - the critical definition is what it means to engage in "excessive" contact.
Personally, I think it's questionable whether Drummer's contact was excessive given that she was going up for a block (not excessive) and assuming KLS was going to jump up and forward to make a layup (reasonable assumption). Instead, KLS pump faked and suddenly Drummer was literally falling down on top of her. I don't think using her arms to brace her fall on KLS's shoulder (and landing one of them on her head instead) was excessive; the alternative would have been to literally have her whole body come down on KLS's head and neck, which would have been very dangerous for BOTH players.
If you guys think Drummer's contact was "excessive," tell me what you think she could have done instead that wouldn't be. If you can't, then it's pretty hard to call it "excessive," since there was no less intensive contact she could have administered given how the play unfolded. And remember, this all happened in a split second.
If anything, what bothered me was that I think Drummer should have helped KLS up, and the fact that she didn't made it look worse all around. But having watched the play 5 times now, I don't really know what she could have done differently, and I think her jump itself would not be excessive had KLS gone for the shot as she assumed.