Is Evolution a science or a faith?

[Esquilax]

If abiogenesis is not the base of evolution, then how you justify the evolution in the first place.

We don't know. And that's it.

Seriously. We don't know how life originated; it could have arisen by natural means, or a god of some stripe could have done it, or some other thing. We know it's at least theoretically possible that it could happen naturally, but that's where the science stops. But we know that things evolve.

In other words, how life originated in first place if it is not spontaneous. Theory of evolution only leads us to believe in the spontaneous emergence of life by not giving appropriate explanation about the birth of first cell of life.

You know what? Gravity doesn't give an explanation about the birth of the first cell either, does that mean gravity leads us to believe in spontaneous emergence too? Evolution and the origins of life are entirely different ideas, evolution doesn't address abiogenesis in the same way cheese doesn't have anything to say about gold: they are not connected.