Christian doctrine on how to treat our non Christian neighbors in a Godly way

We must first "Walk in wisdom toward them that are without, redeeming the time" (Colossians 4:5)

Do we must cheat them? NO We must do good to all men stated in Galatians 6:10.

Respect all men - 1 Peter 2:17

Have honest conversation - 1 Peter 2:12

Be wise as a serpent and meek as a dove - Matthew 10:16

A) HAVING GOOD RELATIONS WITH PERSONS HAVING DEFECTS:

He that oppresseth the poor reproacheth his Maker: but he that honoureth him hath mercy on the poor. - This is from Proverbs 14:31

The reason is in Exodus 4:11 it says "And the LORD said unto him, Who hath made man's mouth? or who maketh the dumb, or deaf, or the seeing, or the blind? have not I the LORD?"

B) WISE AND GODLY WAYS OF TREATING NON CHRISTIANS

Dont touch anything that are filthy and God will accept you and be one of his sons - 2 Corinthians 6:17-18

Example of these are intoxicating wine, pornographic materials, gambling tools and many more. which will bring you bad influene in your character.

We must stay away from wickedness and even its form - 1 Thessalonians 5:22

We must not forsake our friends because they will help you if you are in need if your brother is far away and they are near to you - It is in Proverbs 27:10

C) SUBMITTING OR FOLLOWING TO THE LAWS OF THE GOVERNMENT

Render therefore to all their dues: tribute to whom tribute is due; custom to whom custom; fear to whom fear; honour to whom honour.  - Romans 13:7

We must do this for the Lord as written below and you will be in a good condition:

1 Peter 2:13 Submit yourselves to every ordinance of man for the Lord's sake: whether it be to the king, as supreme;

1 Peter 2:14 Or unto governors, as unto them that are sent by him for the punishment of evildoers, and for the praise of them that do well.

The main reason is to live quiet and peacefully with godliness and honesty - 1 Timothy 2:1-2

God's intention for this is: To convince and save others from false religions (read 1 Corinthians 9:19-22)

The reward is "James 5:19 Brethren, if any of you do err from the truth, and one convert him;

James 5:20 Let him know, that he which converteth the sinner from the error of his way shall save a soul from death, and shall hide a multitude of sins."

And the heaven is in joy when a single person repented - Luke 15:7