i just realized something about deuteronomy?

Please read more carefully.

Nothing could be farther from the truth under the Jewish law if a child was born out of wedlock it had no culpability no sin for the parents act

You are totally wrong, because when Moses said that bit in Deuteronomy, there was no mention of Heaven whatsoever. He said illegitimate children could not grow up to be a functioning part of the covenant nation of Israel: they could not be priests at the temple (any more than could a man with physical defects) etc. But the Bible is full of cases of illegitimate children whose own family line led to kings, and eventually, the Messiah!

Judah fathered 'bastard' twins to his daughter-in-law, yet both twins are mentioned in the line of descent leading to Jesus of Nazareth, the Messiah. Matthew 1:3. Tell that preacher he is grossly misrepresenting what God's word actually says.

1 "My son, forget not my law; but let thine heart keep my commandments: 2 For length of days, and long life, and peace, shall they add to thee. 3 Let not mercy and truth forsake thee: bind them about thy neck; write them upon the table of thine heart: 4 So shalt thou find favour and good understanding in the sight of God and man. 5 Trust in the LORD with all thine heart; and lean not unto thine own understanding. 6 In all thy ways acknowledge him, and he shall direct thy paths. 7 Be not wise in thine own eyes: fear the LORD, and depart from evil. 8 It shall be health to thy navel, and marrow to thy bones. 9 Honour the LORD with thy substance, and with the firstfruits of all thine increase: 10 So shall thy barns be filled with plenty, and thy presses shall burst out with new wine. 11 My son, despise not the chastening of the LORD; neither be weary of his correction: 12 For whom the LORD loveth he correcteth; even as a father the son in whom he delighteth. 13 Happy is the man that findeth wisdom, and the man that getteth understanding. 14 For the merchandise of it is better than the merchandise of silver, and the gain thereof than fine gold. 15 She is more precious than rubies: and all the things thou canst desire are not to be compared unto her. 16 Length of days is in her right hand; and in her left hand riches and honour. 17 Her ways are ways of pleasantness, and all her paths are peace. 18 She is a tree of life to them that lay hold upon her: and happy is every one that retaineth her. 19 The LORD by wisdom hath founded the earth; by understanding hath he established the heavens. 20 By his knowledge the depths are broken up, and the clouds drop down the dew. 21 My son, let not them depart from thine eyes: keep sound wisdom and discretion: 22 So shall they be life unto thy soul, and grace to thy neck. 23 Then shalt thou walk in thy way safely, and thy foot shall not stumble. 24 When thou liest down, thou shalt not be afraid: yea, thou shalt lie down, and thy sleep shall be sweet. 25 Be not afraid of sudden fear, neither of the desolation of the wicked, when it cometh. 26 For the LORD shall be thy confidence, and shall keep thy foot from being taken. 27 Withhold not good from them to whom it is due, when it is in the power of thine hand to do it. 28 Say not unto thy neighbour, Go, and come again, and to morrow I will give; when thou hast it by thee. 29 Devise not evil against thy neighbour, seeing he dwelleth securely by thee. 30 Strive not with a man without cause, if he have done thee no harm. 31 Envy thou not the oppressor*, and choose none of his ways. 32 For the froward is abomination to the LORD: but his secret is with the righteous. 33 The curse of the LORD is in the house of the wicked: but he blesseth the habitation of the just. 34 Surely he scorneth the scorners: but he giveth grace unto the lowly*. 35 The wise shall inherit glory: but shame shall be the promotion of fools" (Provers 3)!

That's weird because heaven was not spoken of back then. It was only made known when Jesus started preaching about the kingdom of God.

It does not say "a bastard child will never walk in heaven".  It makes it clear that such a child cannot enter the assembly of the Lord, which was the ministry that spoke of the perfection of the Lord Jesus Christ.  It is saying they couldn't hold that ministry position.  It has nothing to do with heaven and hell.  So you just made that up.  And that was the law which was only for Israel, and only during that time.  As for heaven and hell, nobody can be good enough to avoid hell.  So to avoid hell, believe in the Lord Jesus Christ. It is that easy.  When a person dies, they will be in heaven or hell, and they can't get out of hell if that is where they go.  To go to heaven and not go to hell, believe in the Lord Jesus Christ, without adding any of your works.  Believe in the Lord Jesus Christ, who is God and who died on the cross and shed His blood to pay for all our sins, and who resurrected from the dead.  See Romans 4:5 and 1 Corinthians 15:3-4.

Congratulations. 

Did you have a question?