Depending on the person's perspective - fearful or secure, hostile or peaceful, hopeful or pessimistic - it will dominate the way they perceive reality. However contrasting another's perspective may be to your own, it is not your job to change them, nor is it your job to convince them to think or feel like you. Rather it is your responsibility to accept others as they are, to deepen your compassion for them and then return to your inner peace, knowing that all is truly well. 
"The good you find in others, is in you too.
The faults you find in others, are your faults as well.
After all, to recognize something you must know it.
The possibilities you see in others, are possible for you as well.
The beauty you see around you is your beauty.
The world around you is a reflection, a mirror
showing you the person you are.
To change the world, you must change yourself."
-Unknown