The "some one else" is Henrietta O'Rielly, whoever she was. It says that right at the top of the form this guy is reading from.
The beneficiary of a trust can refuse to accept it, if they do so in writing within nine months of the death of the person who established it. If they do so, the entire thing goes to the next person in line to receive it. Disclaiming the assets is an irrevocable act, so you don't have the opportunity to get the money back if you change your mind.
So no, the WTBS can't refuse to take money from one part of the trust, it's theirs, and they can't control what the trustee does with the investment, although they could change trustees, which might well cost a bunch of lawyer fees without fixing the problem.
The bottom line here: this is NOT proof of hypocrisy on the part of the WTBS. They are the ongoing beneficiaries of a gift over which they have no control. There are real issues to get pumped up over.