Are you aware that an atheist cannot exist unless there is a theist? If there were no theists on the planet, there would be no atheists. An atheist is simply a response against theists. So, if atheists are to be eliminated from the world, theists must make certain changes in themselves; otherwise, it is impossible.
True theists never profess to be theists. Mahavira is such a theist, but he does not profess to be one. An absolute theist will not even state that God exists, because doing so opens the door for someone to argue that God does not. So, who is responsible for such a situation? When we assert something exists, we invite the "no" response. A true theist will agree with someone who asserts there is no God and will not engage in dispute. 

Is it mandatory to be positive towards God?

When we use "good" in this sense, we mean being able to perform anything that an outside observer would recognize as a beneficial act toward someone else, i.e. being polite.

Scripture provides evidence that all persons are capable of such behaviors.

The biblical understanding of humankind does not begin with Adam and Eve's regrettable bite of fruit. It all begins with them being formed good and in the image of God.

While humanity's fall has profound and long-term consequences, it has harmed but not destroyed the image of God in us. This permits us to reflect our Creator through our actions. If we argue that no one can be decent without God, non-Christians will accurately point to a time when they donated to the Salvation Army or assisted a friend in dealing with a catastrophe.

They can also name many people outside the Christian faith who have lived sacrificial lives, even to the point of death, for the sake of others.

Our faith does not have to be weakened by the presence of your pleasant Muslim neighbor or the humanitarian atheist. If an atheist wishes to depart from this viewpoint, they can choose a subjective understanding of morality that is influenced more by cultural or even individual tastes than evolutionary biology. However, this has its own challenges. Thinking back on his atheist days, he adds, "My argument against God was that the universe was so terrible and unjust. But where did I get this concept of just and unjust? "A man does not call a line crooked unless he has a concept of a straight line."

Humans can know and do good things, not because they believe in God, but because God exists. Our morality is not based on our belief in God's existence, but it is completely dependent on the reality that He exists.

God exists, and individuals can be nice even if they do not believe in Him.

They do not prove that the God of the Bible does not exist. In fact, their behaviors serve as a further reminder of His existence and benevolence.