So for 2000 years god has been unable or unwilling to teach the truth to his people, preferring to allow their sinfulness to distort his message and convince most of the world that he doesn't exist.
This is technically and partially correct, in a way, but not in the way that it might seem. So I feel I need to add clarity first, in order to give useful answers to the questions below.
Your statement suggests that because the majority of people who have entered into the Christian religion have not followed the discipline of Jesus Christ, that God must be unable or unwilling to teach the truth to them. There is another, more accurate explanation though, as 2 Thessalonians 2:11-12 and Galatians 1:8-9 show that only the ones who love truth and hate unrighteousness will find salvation in Christianity. We gain more insight too, from Jesus' words in John 10:4-5, Luke 13:24, Matthew 7:13, Matthew 18:8 and John 12:25.
For truth's sake, we must recognise that a vast majority of people who enter into the Christian religion (for whatever reason draws them), are not ultimately of the nature to love the truth over and above their own desires - therefore, they can not present their self entirely for loyal service to God. These are those of the parable of the sower in Matthew 13, which are shallow-rooted and quickly led astray by various trials and temptations that life brings.
Jesus said: "A new command I give to you, that you love one another. This is how all men will know that you are my disciples, if you have love for one another". Now consider 1 Corinthians 13:4-7, especially "love is not self-seeking, it is always kind to others".
I am sure you will have noticed in your own pursuit of Christian knowledge, that some people are addressing you for your sake, and others are addressing you for their own sake. Yet, of those who are adhering to the discipline of Christ, (namely, to serve), even we must inevitably have some lack in our doctrines and knowledge. This is just a natural result of our limited nature and disadvantaged beginning point, where we have all been born into a world that is polluted by 2,000 years of false teaching and the sinful actions of so-called Christians. It just naturally takes time for a person to grow into who we are becoming. It is a daily growth too, beginning from an initial point of repentance - the moment that we first came to realise and accept, that we have had it all wrong!
Even still, despite the many difficulties and persecutions faced by His loyal servants, they have been steadfast to the campaign, even martyred if need be, for the cause of the knowledge of truth that they had. (William Tyndale & Martin Luther are very famous, world-changing examples of recent history). Jesus tells in Matthew 10:26, that all secrets shall become known because we share with others what He shares with us.
The Christian campaign really does require a united effort, seeing as we all have received a portion of grace, according to the measure of Messiah given to us (Ephesians 4:7-13). The true disciples of Christ are not gossipers and conspirators, we don't get together and form a special exclusive club or an organised cult to achieve specific objectives; instead we recognise each other as honest men of integrity, having right relationship with God, as we encounter The Holy Spirit in each other - wherever our paths happen to cross. We live an innocent, meek sort of life, simply doing whatever it is that we do. In this way, it is God who is the architect of what we achieve in His name, with what we do. We can only be useful servants if we remain obedient to Him (Romans 6:16), but therein exists the unity of the Christian campaign (Luke 15:4).
(Hence, a vast majority of so-called Christians choose to not live obediently, and the harm they do, is done in His name - Jude 1:19, Deuteronomy 5:11).
Why do you think God chose this path?
John 4:23 and Matthew 8:10. At the time, when Jesus had performed a powerful ministry without fault, and had yet been unable to bring the lost sheep of The House of Israel to recognise the true nature of YHWH (John 14:7, John 8:37-47), then this was the only way that God could achieve the true and final success of Zion through love, without compromising His righteousness (Matthew 26:52-53, Luke 21:24).
Have a think in this regard, that the covenant for the Kingdom of God established via Moses, could no longer be sustained by the Jewish religious leaders, because they had claimed authority to shed the righteous blood of Jesus, who was innocent, in the name of YHWH.
Could he have chosen otherwise?
I expect, probably not. Otherwise, why else would The Father have chosen to not grant Jesus' request at Mark 14:36? (1 John 4:8). Remember that mankind makes decisions too, and that Israel is named Israel, because Jacob wrestled with God and prevailed (Genesis 32:28).
If you would like to better understand what has been achieved by Jesus' sacrifice, you can consider what the following scriptures convey in context of us being appointed in His name, to be His representatives on earth (1 Peter 2:9):
Luke 21:22, Luke 12:49, 1 Peter 3:22, 1 John 2:1, 2 Timothy 1:7.
