What is this verb's stem?

Hi! I am doing a study on Zechariah 12:10, and I am trying to figure out the verb stem for the word דָּקָרוּ Basically, I am trying to figure out if the verb is meant to be active (he loved) or passive (he was loved). After many YouTube videos, I am still uncertain. I looks like a qal stem, but the second vowel is a qamets instead of a Patach, Tsere, or Cholem, which is throwing me off. Would you be able to help? Also, would you be willing to explain how you reached your answer? It would be much appreciated! Thank you!