The difference between liberals and conservatives is that conservatives understand that there is a difference between a person and a person's opinion, whereas liberals see the two as one and the same, that is conservatives see reality as existing independent of what anyone thinks, whereas liberals think that thoughts are reality. This is why liberals can't understand the difference between disagreeing with someone about something, versus hating that person*.
*To be fair, most (but not all) liberals are capable of calmly discussing impersonal matters.
*To be fair, most (but not all) liberals are capable of calmly discussing impersonal matters.