When you like something it does not need to be a rational choice, and when someone challenges it, your ego is hurt. Think about this for a second.
If you seem to be nodding to this notion, step back and see what you are trying to achieve with your marketing campaigns. Understand that no one likes to be told that his choice is bad. He won’t listen to you.
Millions (in money and time) has been wasted in trying to change the target’s mind. It just doesn’t happen. If he permits, try and provide information that helps him in his decision making. That’s your best bet today.