Really?? People's theology cause them to act out on what they think/believe. I have met so many people who reject Christ because of the "Christians" (who are acting out on their theology) they have encountered. I believe flawed theology has a HUGE part in keeping people out of the Kingdom of God, therefore rejecting Christ.
Jesus taught this,
John 3:18-21 KJV
18) He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.
19) And this is the condemnation, that light is come into the world, and
men loved darkness rather than light, because their deeds were evil.
20)
For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.
21) But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
From Romans,
Romans 1:18-22 KJV
18) For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who hold the truth in unrighteousness;
19) Because that which may be known of God is manifest in them; for God hath shewed it unto them.
20) For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
21) Because that,
when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
22) Professing themselves to be wise, they became fools,
People choose their sin instead of coming to God, lest their sin be revealed. So they refuse to acknowledge Him, and turn their minds to emptiness.
Jesus also taught,
Matthew 23:15 KJV
Woe unto you, scribes and Pharisees, hypocrites! for ye compass sea and land to make one proselyte, and when he is made, ye make him twofold more the child of hell than yourselves.
There are those who actively work towards keeping people away from God in the pretense of bringing them to Him.
In the end, though, each person makes their own choice, and the way I'm reading it in these places, it's because they want their sin, and refuse to accept the God they, in their heart, they know is real.
Much love!