Charles Ellicott Commentary Acts 13:45

"But when the Jews saw the multitudes, they were filled with jealousy, and contradicted the things which were spoken by Paul, and blasphemed." — Acts 13:45 (ASV)

They were filled with envy.—They heard the Apostles speaking to the multitudes, not in the condescending, supercilious tone of those who could just tolerate a wealthy proselyte of the gate, who could purchase their favor, but as finding in each of them a brother standing on the same level as themselves, as redeemed by Christ. This practical repudiation of all the exclusive privileges on which they prided themselves was more than they could bear.

Contradicting and blaspheming.—The latter word implies reviling words with which the Apostles were assailed, as well as blasphemy in the common meaning of the word.