Research Calderoni's past. You can see what he has done with Elliott in the past, and see when he started to get involved with Citrix. He got involved about a year before the Elliott letter. Obviously, he is one of Paul Singer's vultures that does recon to find the next victim.
I would say "how the Elliott group is not in jail is beyond me", but it is obvious - money.
Give the US another 20 years before this kind of actions will be outlawed. Then another 50 for the wealthy to take over and repeal the law.