Let's not kid ourselves--PBS represented in 2012 .014% of the federal budget. There's no financial reason for cutting off funding other then political ideology. This certainly is not the first time Republicans tried to destroy PBS.
Mister Rogers defending PBS to the US Senate (1969)
Mr. Rogers Talks About Violence and Shootings
Patrick Stewart: Don't Support PBS Stations
Obviously Republicans always hated funding 'The National Endowment For The Arts' on every level. Ask yourself... WHY?