The opposers of the truth are the lies we believe of the enemy of our souls . The father of lies is the devil, (John 8:44).
According to scriptures all those who speak again the will, the way and the word of God are opposers of the truth.
The Bible call those who oppose the truth reprobates.
Examples can be seen
in Scriptures
Exodus 7:10-13
Also the men who was send to spy out the promises land came back with an evil report. Numbers 13:25-14:10.
2 Timothy 3:1-8 reprobate minds.
Any one who speaks contrary to the Will, way or Word of God are opposers to the truth.
Romans 1:18-32
Luke 8:16-18