Rethinking the demeaned

We all have people in our lives of whom we think little, who are demeaned and denigrated in our thoughts and attitudes.

In today’s first reading (Philemon 7-20), St. Paul is writing to a slave master about an escaped slave of his: about whom the slave master would have a very, very, very low opinion.

Yet St. Paul exhorts him to treat this despised one
"no longer as a slave
but more than a slave,
a brother,
beloved especially to me,
but even more so to you,
as a man and in the Lord."

Do we need to rethink our view of fellow Christians of whom we think badly?

Do we need to remember that they are our brothers and sisters and renew our love for them in the Lord?