Yes sir!

NNescio said:

The Black King is Jesus, right? Multiplying food, healing, and cursing living things to wither, all rolled up in one power package, plus he has that crucifixion scar on his palm. Also explains why Jeanne is such a fanatic.

its heavily implied, but it has not been outright said that he was.

<Black King> Get down on your knees and tell me you love Drifters.

(Home Alone tag missing?)

Read this series and it is totally heavily implied that he is the man itself.

The author doesn't want to trigger those folks.