...welcome them back from their battles to tend to their wounds.
This is a big part of it. It is easy to hold a resentment against those who go counter to what we wish. I know it is easy for me to feel "violated" when some engage upon activities of this nature when they presented a different image of themselves.
No matter...it is my problem to get over....acceptance is for me to work on and others are the opportunity to do that.
They are who they are...walking the path they are...making the choices they do....
It is up to me to accept them for where they are at on their journey and care for (about) them.
Welcome back does require a reconciliation process too. Healing on both sides must take place. Boundaries are critical during that process.