People not taking the truth

Why do people always/usually believe the opposite of the truth, I mean why do they not want to take the truth? Why do they say the person is lying when they have no proof at all and/or they dont know that person personally? It annoys me that people dont want to take the truth and always force their opinions on others.

this is a easy question its because they are scared of the truth and dont want to accept it.

+1 on rachel882

100% agree

I believe that sometimes "the truth" can have many differing perspectives, and it is always up to an individual to judge just what "the truth" is . there are countless examples of this in eyewitness police reports.
to one person water is blue, to another that water is clear- both people are right from their different perspective- and thus both are speaking "the truth", now place those same people in a room and tell them to describe water to each other- and the argument will ensue.
so we need to be careful about proclaiming what "the truth" actually is, most truths are not "absolute" but can vary with perspective, which requires a thinking and thoughtful person to try and see "the truth" from every possible angle before deciding that someone is afraid of "the truth" or just shortsighted or stubborn.
your responses above are also very true.