Given the following passage

"The emperor Julian made a short-lived attempt to revive traditional and Hellenistic religion and to affirm the special status of Judaism, but in 380 under Theodosius I, Nicene Christianity became the official state religion of the Roman Empire. Pleas for religious tolerance from traditionalists such as the senator Symmachus (d. 402) were rejected. Christianity became increasingly popular. Heretics as well as non-Christians were subject to exclusion from public life or persecution, but Rome's original religious hierarchy and many aspects of its ritual influenced Christian forms, and many pre-Christian beliefs and practices survived in Christian festivals and local traditions.",

answer the following question. Note that the answer is present within the text.

Question: Who was looked down upon?
Heretics as well as non-Christians
Heretics were people who professed a false faith, and non-Christians were those who did not follow the Christian religion. The text mentions that heretics as well as non-Christians "were subject to exclusion from public life or persecution". Since being excluded from public life or persecuted suggests having negative consequences due to one's actions, it can be inferred that these groups of people are looked down upon by others in society.
So the answer is Heretics as well as non-Christians.