The word for “destroy” appears [elsewhere in the Bible in] …Psalm 80:13 about wild boars that destroy or “ravage” a vineyard. Saul’s zeal was so great against Christians that it was as if he were wildly raging against them.
– Toussaint, S. D.
 Toussaint, S. D. (1985). Acts. In J. F. Walvoord & R. B. Zuck (Eds.), The Bible Knowledge Commentary: An Exposition of the Scriptures (Vol. 2, p. 372). Wheaton, IL: Victor Books.