its hard for me to fault voters for their ignorance. your average joe won't be subscribing to the NY Times, if that's even considered a valuable publication anymore (it was required reading in my poli sci class, but that was 15 years ago, lol.) what they will be doing is watching the local news or maybe the nightly national news. by doing this they'll be subjected to a typical bias, blue if its NBC red if its Fox, etc. And as such they'll absorb the "issues" as they are presented, however accurately or inaccurately that may be.
in essence an average voter's intelligence -in regards to political issues- IS fairly limited, if nothing more than a regurgitation of buzzwords and sound bytes. much like kids at the dinner table who later resound their parent's poli-talk at school, having no real ideas of their own. and this limitation is then translated into the voting booth, where a match game is made, trying to fit the square peg into the round hole.
your angry voters' emails are a common display of this transference. people are easily swayed by those in authority, ergo priests and politicians. true the bill may not mention the word Catholic, but its not far fetched to be seen as anti-catholic when painted as such. those same voters could be swayed in favor of the bill if they attended a town hall meeting displaying the importance in not letting rapists off the hook simply because too much time had elapsed. it's just too outrageous for people to stomach that their priesthood may be responsible for actively trying to cover up these things.
the solution here is not to dismiss people as idiots, but rather hold politicians and other authority figures responsible for their portrayals. by keeping the public purposefully mislead you are bound to get unfair responses. democracy as such can only really work if whats being discussed isn't skewed in the name of votes. but this won't happen in reality, because there's too much to lose. politicians really do have axes to grind, and if their voters and supporters really knew what they were up to, they'd not get elected. and if the voters got dumbed down (but still accurate) versions of bills, (like getting a cliff's notes for the health care reform package) would they still get behind them? perhaps not.