A.T. Robertson Commentary Luke 20:6

"But if we shall say, From men; all the people will stone us: for they are persuaded that John was a prophet." — Luke 20:6 (ASV)

Will stone us (καταλιθασε). Late verb and here only in the N.T. Literally, will throw stones down on us, stone us down, overwhelm us with stones.

They be persuaded (πεπεισμενος εστιν). Periphrastic perfect passive indicative of πειθω, to persuade, a settled state of persuasion, "is persuaded" (no reason for use of "be" here).

That John was a prophet (Ιωανην προφητην εινα). Accusative and infinitive in indirect assertion.