There are two important sides of rationality:
The first is for one to learn to understand and define one's own actions.
The second is to learn to appreciate the rationality of others.
Because each of us has our own unique minds filled with slightly different understanding of definitions and premises, there will always be misunderstandings and logical inconsistencies in discourse.
As such, I believe that one of the greatest acts of love and kindness is to openly appreciate the rationality of others.
One of the most base acts of hostility is to deny the rationality of others with hostile labels such as "wingnut."