When Antonio Swad made what he said was a simple business decision -- accepting pesos as well as dollars -- in his Texas-based pizza chain, he was unprepared for the public's reaction. He received thousands of hateful e-mails and phone calls. And death threats. "We didn't think ... that we'd be linked with the controversy that surrounds illegal immigration," Swad, the founder and chain owner of Pizza Patron, told CNN on Monday. "And that's [where] we found ourselves; swimming in that water almost immediately." (Watch owner defend controversial dough ) Some believed the policy of accepting pesos discouraged Mexican immigrants...