Intelligent designs by a God

Most religions are based on faith. Their god or gods requires followers to believe without direct evidence. However, Intelligent Design requires that if there is an omniscient creator who has used his or her intelligence to make it appear different from his own form of creation of living things, and has left the evidence around for all to see. There is clearly a contradiction here.
Why would a god want us to stray away from what is correct.

Let us assume that the the Intelligent Design is true, that LIFE as we know it was created by some intelligent being and that the creation of a living being by chance is as unlikely. This means that Intelligent Designs becomes a non-negotiable fact, which proves the existence of a creator.

However, you cannot now claim that that creator was an omniscient God, otherwise you are claiming that you have undenaiable proof of the existence of God, which denies the idea of "faith", a cornerstone of almost all religions. Therefore it can't be claimed that the Intelligent Designer is God, unless you are claiming that God created the world, then carelessly left the evidence for all to see. This would deny his all knowing ability or care for the worlds directions...

Please leave your thoughts on this.