repentance follows confession and is a turning away from sin.
I would say, so long as the trespasser is repentant, then most should be reconciled. Biblically speaking, Corinthians even points us to a story of incest in which he taught reconciliation; however I am with reservations on this based on the culture of abuse and rape; and in such case would not find it wise; so in essence I would say reconcile, unless there are extreme cases. The Bible says we ought to not just welcome the repentant back, and forgive, but ALSO comfort, so they do not fall into deep sorrow---in other words, depression....and yet, here we stand without over 90% of Christians refusing reconciliation, for even the smallest of sins; alongside an all time high depression rate. This is no coincidence. In fact, when you hear 90% of sermons on reconciliation out there--it is almost always about between God and man...which is great! But they completely avoid the reconciliation with other brothers part...which actually negates the first one since God says you cannot love God and hate your brother.
And no, hate is not how you feel...so when you say I don't hate him/her, I just don't want to be friends...you're saying you hate with your actions. Love and hate has ALWAYS been defined by actions more than words, biblically speaking. Some people say hate is the absence of love--I would say hate is the withholding of love.
Well, in theory, every group of people is bad...because we're all sinners; The reason I prefer diversity is that it speaks volumes to a godless racist world looking for hope.