We don't know what Williams was watching, or that television played a role in his decision to target Tides. However, if it did, according to our Nexis searches, the primary person on cable or network news talking about the Tides Foundation in the year and a half prior to the shootout was Fox News' Glenn Beck.
According to our searches, since Beck's show premiered on January 19, 2009, Tides has been mentioned on 31 editions of Fox News programs, 29 of which were editions of Beck's show (the other two were on Sean Hannity's program). In most of those references, Beck attacked Tides, often weaving the organization into his conspiracy theories. Two of those Beck mentions occurred during the week before Williams' shootout.