This argument is a non-starter if you understand trusts. The WTBS has no control over what the trust owns, invests in, or how it disburses the funds. The only thing it could possibly do is send the checks back to the trust. You might make a case that by keeping the money, it is benefitting from defense industries, but I think their are much bigger fish to fry when looking for reasons to attack the WTBS.
Reminder: I'm a retired accountant.