Ok. I can agree that there happen changes in offspring. I just don’t believe those changes could lead to all species from single species.
Seeing chain of species is not itself really evidence that it was the system that produced all. Or what do you think, in houses it can be seen chain of evolution, from caves to skyscrapers. Are buildings made and designed by evolution, or by humans? With evolutionists logic, the answer should be by evolution. While person who believes in God can easily see the creator behind of it.
You are correct, seeing a chain of species is not enough evidence. But I did not offer such a chain as evidence in a vacuum. There much more evidence than that. You can readily find it, but here is a site that explains much of it. TalkOrigins Archive: Exploring the Creation/Evolution Controversy. Read up on all of the evidence so you are informed and then we can continue to discuss the topic if you wish. I cannot possibly type in all of the evidence here, there is far to much, coming from numerous scientific fields. Also, read the responses to creationist claims and be ready to offer a rational response to those.
Allegedly God created animals. The animals exist, so we have evidence for the creation. But obviously we could make other explanation for that. However, if we couldn’t find any animals, we would have reason to doubt it really happened.
The fact that animals exist is not evidence of an intelligent creator. There existence does not in any way demonstrate that. The claim of the existence of a creator requires proof of it's own. First you demonstrate (not just claim) that the god exists, and then demonstrate (not just claim) that the god can create animals.
I could allege that magic pixies created animals, but that does not provide proof that they did create animals or that pixies exist. I would have to demonstrate that pixies actually exist and that they can actually create animals.
You said it yourself...a god "allegedly" created animals. It is an allegation, not a demonstrated fact. There is plenty of evidence that genetic drift is influenced by environmental factors.
If you do not believe that genetic changes can accumulate over a very long time frame to produce populations of animals different enough that they can be classified as separate species, then present the evidence for the barrier that halts the genetic drift prior to speciation.
Other possibilities are that life appeared spontaneously, without God. If that would be true and life on earth would have that property, I think we should be able to see it in nature. There is no such observation, therefore it is more likely that God created.
Are you talking about abiogenesis, (the origin of life), or are you saying that all animals might have appeared fully formed as they are today? If the later, what would make you think that? What would we be able to see in nature?
But let's do a thought experiment: Let's suppose that evolution was proven to be wholly false tomorrow. Where does that actually leave us?
Now we only have a mystery. It in no way demonstrates that your god does or ever has existed, or that it had anything to do with creating anything in the universe. We would simply not know how life and it's diversity came about.
You would still have all of your work ahead of you to demonstrate the existence of your god and to demonstrate it could create anything at all, much less the universe and life.
Bonus question: What does evolution have to do with atheism?
Answer: Nothing at all.