Can you really forgive?

A Christian and a Buddhist walk in to a bar

A town wants to forgive a ‘good’ brother for killing a ‘bad’ brother. Until they find out the good is actually the bad and forgiveness is off the table.

What even is forgiveness anyway? Can we have it, and how is it Buddhist or Christian

https://slatestarcodex.com/2014/09/30/i-can-tolerate-anything-except-the-outgroup/?fbclid=IwAR0E_fYjeCRe79H-9QhosmmGBTAPhhGPFrmq07x1CTggfqsC3jEAwsbZTG4