It's not Calvinist theology. It's right there in the Bible, and it will remain there no matter how many times I quote it.
John 6:65 He went on to say, “This is why I told you that no one can come to me unless the Father has enabled them.”
And, yes, what he's saying about parables is that God chooses on whom to have mercy and whom He will harden. That's monergism. You may not like it, but God doesn't give a rat's bahootie what you like and do not like. Don't have faith in your opinion. Have faith that God is God and does whatever He will with His creation. Respect that and that's how you trust God with everything.
So what? Everyone holds revelation is needed to enable faith
Please address the argument of the op instead of running elsewhere
God had mercy upon those with faith and hardened those without it
That is not teaching Calvinism
and this denies unconditional election and reprobation
Romans 9:30–32 (KJV 1900) — 30 What shall we say then? That the Gentiles, which followed not after righteousness, have attained to righteousness, even the righteousness which is of faith. 31 But Israel, which followed after the law of righteousness, hath not attained to the law of righteousness. 32
Wherefore? Because they sought it not by faith, but as it were by the works of the law. For they stumbled at that stumblingstone;
Romans 10:18–21 (KJV 1900) — 18 But I say, Have they not heard? Yes verily, their sound went into all the earth, and their words unto the ends of the world. 19 But I say, Did not Israel know? First Moses saith, I will provoke you to jealousy by them that are no people, and by a foolish nation I will anger you. 20 But Esaias is very bold, and saith, I was found of them that sought me not; I was made manifest unto them that asked not after me. 21
But to Israel he saith, All day long I have stretched forth my hands unto a disobedient and gainsaying people.
Romans 11:20–23 (KJV 1900) — 20
Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear: 21 For if God spared not the natural branches, take heed lest he also spare not thee. 22 Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off. 23
And they also, if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again.