The crowd cheered him, saying they stood with him against Russia.
"I'm going to be arrested shortly, will you let the cameras know that that's why I've done it?" he said to protesters.
"I've done my bit, lads. It's about time the rest of Ireland done their bit," he said as police escorted him away.
The officer tells Wisley: "I have to arrest you now, unfortunately, for dangerous driving".
The crowd kept cheering and applauding the man's actions as he was led away from the scene.
The Russian embassy in Dublin later said the truck had "torn down" the gates at 1:39pm.
"The incident took place in the presence of Garda officers, who stood idle," the embassy said.
"The Embassy strongly condemns this criminal act of insanity directed against peaceful diplomatic mission. The Embassy views this incident as a clear and blatant violation of the Article 22 of the Vienna Convention on Diplomatic relations of 1961."
"The Embassy is in contact with the Department of Foreign Affairs of Ireland, demanding that the Irish authorities take comprehensive measures to ensure the safety of its staff and their family members."
"The incident is cause of extreme concern. We believe that no people of sound mind could support such senseless and barbaric actions."