Blagofuckinjevich? The insert almost invariably goes before the stressed syllable – the exceptions are, to my knowledge, all after a prefix, such as unfuckingbelievable – and so, surely, this is wrong. Especially since the governor’s name is pronounced much more closely to blagoy-evich than blago-yevich. Just try saying that out loud: Blagofuckinjevich. Now say Blafuckingojevich. The first one turns into that pseudo-Swedish prosody. The second one allows you to hit the "goy" with satisfactory savagery.

I believe Professor Pullum has erred.

Indeed.