Matthew Poole and continuators on 2 Kings 10:23

23 And Jehu went, and Jehonadab the son of Rechab into the house of Baal, and said unto the worshippers of Baal, Search, and look that there be here with you none of the servants of the LORD , but the worshippers of Baal onely.

Whom the Baalites possibly did not know, and therefore suspected nothing; or, if any of the more crafty sort suspected any thing, it was now too late to amend their Error.

Because their presence will offend Baal, and deride, or pollute his Worship: whence Prophane persons have been oft excluded from Solemn acts of Worship, both by Iews and Heathens. So this did not raise their suspition.