Short answer:
Lol.
Longer answer:
He would be hated by many, derided, persecuted, argued against, ridiculed, warned by staff/banned with unjust, contradictory and hypocritical rulings and decisions, thought of as wicked, have others attempt to humiliate him and make him ashamed, etc.
How his children are treated is evidence of this. If they persecuted Christ, his children will be persecuted as the servant is not greater than his Lord. They threw accusations into the teeth of God, and will do so to his sons and daughters.
Just because people claim Christ doesn't make them Christians. Christians are evidenced by the love they have for one another. People claimed to be Jewish because they were descendents of Abraham, and yet they murdered the Jewish God. No difference here, times do not change, darkness will always hate and gnash against light.
However, he would teach the humble on the forum and would bring a lot of light into the forum like there never has been. He would stump those who are very sure of their vain philosophies, and no rhetoric could match his.