Depending on the issues presented, moderates may look confused or incapable to make up their minds. They stay in the middle, not taking any stand in fear of rejection or repercussions. I could hardly trust a moderate because they are so unpredictables and unreliable. They swing their opinions as the breeze changes. Extremists at least take a position and a stand, whichever the side they are inclined to be, and you know how to approach them.
