Faith Vs Knowledge

[Severan]

I'm struggling with something and I wanted to get others opinions on this.

It appears to me that we have various theists on the forum, along with innumerable famous theists / Christian Apologists etc. that claim to know, for certain, that God exists, that he's their God and so on and so forth.

My understanding is that God is supposed to withhold that knowledge - which is the point of his demanding faith.

If they do have that knowledge or certainty doesn't that make God a liar?

At the same time how can they demand or even request others to follow their path on the basis of faith if they have the luxury of knowledge and are not reliant on belief alone?

Anyone?

Their inability to comprehend biology is NOT proof of god.