Don't Panic

Let's look at the modern notion of Christianity where there is a single god, who is omnipotent and omnipresent and omniscient, who created everything, and who has a will and a Plan.

Accept that at face value for a moment, and then mix in the contradictory idea that this god gave its creation, mankind, free will.

If this god knows everything and has a plan by which the occurence of anything can be explained, that means it has preordained how everything will happen based on its ability to know the past, present, and future of all existence.

But mankind was given free will; the ability to make their own decisions and go against the natural order of things.

Let's build a scenario.

You sit in front of an apple and a banana. You must choose one to eat. The will of this god, the preordained plan that has already dictated which one you will eat, says you will eat the banana.

If you choose the banana, you don't actually have free will because what you were going to do was already “destined” to happen and this god knew it.

If you choose the apple, you are exercising the free will you were given, but you are now acting contrary to this god's will and plan. The omnipotence of the god, the plan they conceived, the will they had, was absolutely pointless, powerless, and non-existent.

Free Will and an Intelligent Creator with a Will/Plan is contradictory.

God gave us free will to test us; to discern the good from the evil based on our choices and our following of His teachings.

But if this god is really omniscient, they already know who's gonna decide what and where they'll end up as a result, meaning our future has already been determined and is inescapable, meaning we don't actually have free will because we'll end up with the same result no matter what we “decide” to do.

If we really have the ability to learn, to grow, and to earn salvation through acting differently than what was preordained for us, that means we have the ability to surprise this god, disrupt their plan, become something said god didn't think we could become.

Thus disproving a creator's omniscience, omnipotence, and will/plan.

Even if you entertain the notion that, once mankind was granted free will, the creator of all things could still see all possible outcomes but just didn't know which one would happen. In this scenario, such a god could still be deemed omnipotent and omnipresent, but their ability to know all things and have a Master Plan just went out the window because that god is no longer in control of nor aware or certain of what the future holds.

Free Will granted by an All Powerful Creator is contradictory.

If we have free will granted by a creator, then that creator truly has no power over us, nor any knowledge of what we will do or where we will end up. And if such a being has no power over us, why would we spend so much time trying to earn its good graces and following its rules? If it's because where we'll eventually end up is the result of and consequence of our actions, then this “god” essentially set us at the start of a hedge-maze filled with traps of its own design and then sat back and said “figure it out, dummies.” Our only salvation would be that the rule book we have is accurate, but how could it be if this god is not all-powerful and all-knowing?

If everything that happens is “according to God's Plan,” then we truly have no impact on the world, our place or future within it, or any of existence. That would make us akin to ants on a farm in a glass jar on this god's desk, while they gleefully and sadistically sit back and watch whether we burrow a hole or choose the poison. And who would want to worship someone like that?

It just doesn't make sense. You can't have both. Not without God being the Devil itself.