I agree with your comments about finding broader arguments.
 
I think it is also good to include opposite points of view.  We need to be aware of what other people think.  Even though sometimes as we read about the opposite side, we have to hold our noses.
 
I was at a National Sierra Club lobbying activity in Washington, DC several years ago.  The speaker asked us (about 60 people) to raise our hands if we watched Nascar, if we regularly went to or watch professional football games, and the like.  No one (or very few) raised their hands.
 
Then he asked us if we watched public television regularly, if we listened to public radio regularly, if we read newspapers regularly, if we read books, and other related questions.  For most of those things, most of the group raised their hands.
 
Then the speaker said, "You folks are in the minority".  That really opened a lot of our eyes.  As Sierra Club members, we like to believe that we are right on our issues.  But there is a whole world out there that does not necessarily follow us.
 
Knowing the opposition will help us better form our arguments, so we can win others to our side.
 
Pam