The Quran has already solved the masla....
qulu washra bu... khao peo jann banao.. they are all naymatain from Allah, say bismillah and every thing is halal. (except those quoted above).
Wow what a great analogy man... Please give me the reference....
Now let me ask you something... based on your analogy.. Woud it be rite if I recite Bismillah before doing any haram kaam.. would it make it halal?