John Gill Commentary 2 Kings 17:19

"Also Judah kept not the commandments of Jehovah their God, but walked in the statutes of Israel which they made." — 2 Kings 17:19 (ASV)

Also Judah kept not the commandments of the Lord their God ,
&c.] But were infected with the idolatry of the ten tribes, and drawn into it by their example, and persisted therein, notwithstanding what befell the ten tribes; which are aggravations of the sins of them both, see (Jeremiah 3:7–10) ,

but walked in the statutes of Israel which they made ;
worshipping the calves as they did, particularly in the times of Ahaz, he setting the example, see (2 Kings 16:3) .