In 2 Corinthians 11:13-15, the insincere are false apostles masquerading as righteous—deepening the warning about deceptive helpers.

Galatians 2:4 describes false believers infiltrating to spy—exactly matching the insincere joiners who feign support in Daniel.

Romans 16:18 exposes deceivers with smooth talk—parallel to the insincere joiners who appear helpful but are not genuine.

Matthew 7:15 warns of false prophets in sheep's clothing — similar to the flatterers who pretend to help in Daniel 11:34.

Acts 20:29 warns of wolves entering the flock — parallels the flatterers who infiltrate among the faithful in Daniel 11:34.

Acts 20:30 warns of false teachers rising from within — similar to the flatterers in Daniel 11:34 who cleave with deceptive intentions.

1 Timothy 4:1 warns of later apostasy and deceiving spirits—a broader context of deception paralleling the insincere falling away.