Claiming to be born again does not guarantee your salvation

          ester :

Will anyone who is "born again " end up in Hell?

If they fall away, yes.

Hebrews 6:4-6
King James Version (KJV)
4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
5 And have tasted the good word of God, and the powers of the world to come,
6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.

Meat On Lenten Fridays: A Mortal Sin?
Thus one must substantially observe the law of abstinence on such days, and the obligation to do so is a grave one, meaning that it satisfies the condition of grave matter required for mortal sin. If one knowingly and deliberately fails in this obligation then one has committed mortal sin.

Scripture says that obedience to the Church is required of all believers:

Matthew 18:17
King James Version (KJV)
17 And if he shall neglect to hear them, tell it unto the church: but if he neglect to hear the church, let him be unto thee as an heathen man and a publican.

You simply wave your hands and say, "I'm saved!"

Luther:

Thus, the Savior is self.

I'd like to note that you quote no Scripture. You simply post little ideas which are removed from any Christian teaching and posit them as authoritative.

That's not what Scripture says. Scripture describes Jesus as the Saviour and at the very same time instructs us to participate in our own salvation. Without apology:

Philippians 2:12

King James Version (KJV)
¹² Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling.

AT MOST, Jesus is the Helper.
Self is the Savior.

Again, this is what you say but not what Scripture says. Scripture describes us as FELLOW LABOURERS with God. That means that we assist God.

1 Corinthians 3:9

King James Version (KJV)
⁹ For we are labourers together with God: ye are God's husbandry, ye are God's building.

It's not CHRIST's works, life, heart, obedience, righteousness; it's not the Cross of Jesus.
It's ME. My works, my life, my heart, my obedience, my righteousness, my cross.

Again, that is not what Scripture says. Scripture describes OUR WORKS as God's works:
Philippians 2:11-13

King James Version (KJV)
¹¹ And that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.
¹² Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling.
¹³ For it is God which worketh in you both to will and to do of his good pleasure.

It's called synergism.

Correct.

It's a heresy.

Yours is the heresy. Scripture is very clear what we are supposed to do to save ourselves and those who hear us. 

1 Timothy 4:16

King James Version (KJV)
¹⁶ Take heed unto thyself, and unto the doctrine; continue in them: for in doing this thou shalt both save thyself, and them that hear thee.

Scripture is clear that God saves those who do His works:

"Christ helps those who help themselves"
"Christ is the Helper, I'M the Savior."

That is precisely the Protestant attitude. You don't even hope in God's Just Judgement. You simply wave your hands and say, "I'm saved!"

Or as Catholics like to put it, "Jesus opened the door to heaven but we gotta get in by our own efforts."

Its a good analogy. Very much in accordance with Scripture. We can see it illustrated in the Parable of the 10 Virgins:
Matthew 25

King James Version (KJV)
25 Then shall the kingdom of heaven be likened unto ten virgins, which took their lamps, and went forth to meet the bridegroom.
² And five of them were wise, and five were foolish.
³ They that were foolish took their lamps, and took no oil with them:
⁴ But the wise took oil in their vessels with their lamps.
⁵ While the bridegroom tarried, they all slumbered and slept.
⁶ And at midnight there was a cry made, Behold, the bridegroom cometh; go ye out to meet him.
⁷ Then all those virgins arose, and trimmed their lamps.
⁸ And the foolish said unto the wise, Give us of your oil; for our lamps are gone out.
⁹ But the wise answered, saying, Not so; lest there be not enough for us and you: but go ye rather to them that sell, and buy for yourselves.
¹⁰ And while they went to buy, the bridegroom came; and they that were ready went in with him to the marriage: and the door was shut.
¹¹ Afterward came also the other virgins, saying, Lord, Lord, open to us.
¹² But he answered and said, Verily I say unto you, I know you not.

Notice how they WALKED IN with Christ.

Sincerely,

De Maria