I tell you that he will avenge them speedily. Nevertheless when the Son of man cometh, shall he find faith on the earth? He will avenge them speedily - Or, He will do them justice speedily - εν ταχει, instantly, in a trice.
1. Because he has promised it; and
2. Because he is inclined to do it.
When the Son of man cometh - To require the produce of the seed of the kingdom sown among this people.
Shall he find faith on the earth? - Or rather, Shall he find fidelity in this land? Shall he find that the soil has brought forth a harvest proportioned to the culture bestowed on it? No! And therefore he destroyed that land.