Thoughts have a magnetic quality to them. One thought reminds us of another. If we have a sad thought, that reminds us of another sad thought. If we have a happy thought, that reminds us of another happy thought.
This magnetic attribute of thoughts forces them to coalesce into beliefs, beliefs coalesce into belief systems, and beliefs systems into realities.
There is no difference at all between what we believe and what is real. Sameo sameo.
To add to this insult, every thought we have, we believe to be true. So the end result is that we believe all of our thoughts to be real. What we think is what is real. What is real is what we think.
Now obviously all of our thoughts and therefore all of our beliefs cannot be true. So the problem now becomes, which one of my thoughts is not true? That one? Or that one? The only solution is not to believe anything, right?
So when we have an argument with someone, what he or she hears us saying is that what is real is not real. How stupid can one get? Any wonder why some arguments get so vitriolic?