They literally explained why it was a shakedown. I don't know what else needs to be said.
The parents of the victims are suing organizations that have no chance of being held liable in the hopes that they get some form of payout. That's what a shakedown is.
It's tragic and I get their anger, but this isn't going to succeed. Any legal team worth its retainer fee will successfully defend this.
The term "shakedown" has been used to describe frivolous lawsuits seeking to strong-arm settlements from defendants for decades. Language is descriptive, not prescriptive.