That person you saw lashing out, shaming others, making the wisecrack, abrupt and over-reactive, rude and disruptive and getting ahead at the expense of others is operating inside of a fear-based, painful reality.
Protective behaviors emanate from emotional wounds and brokenness.
You can allow compassion to break your heart or criticism to harden it.
While it's not OK for people to transmit their pain and it's imperative you create healthy boundaries must, empathy goes a lot further than anger…for all parties involved.
Only the non-dualistic mind is equipped to hold contradictions like this together.
"Don't judge the behavior, seek to understand the motivation." Joyce Meyer