This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles, in the vanity of their mind, having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart.”(ref, Eph 4*17-18).
For many spent enough time in the past doing what the gentiles like to do, living in sensuality, sinful desires, drunkenness, wild celebrations , detestable idolatry, they insult you now because they are surprised that you are no longer joining them in the same excesses of wild living. They will give and account to the one who is ready to judge the living and the dead.
For God’s wrath is being revealed from heaven against all the ungodliness and wickedness of those who in their wickedness supress the truth. Regarding your former ways of life, you were taught to strip off your old nature which is being ruined by its deceptive desire.