Whether all agree with you or not, Jan, we can agree that you have presented your evidence in a logical way, which is quite admirable.
All the same even with what you present we can still take the opposite view, namely that life came into existence as fully distinct species rather than slowly or even fairly quickly evolved.
How so? Well, one can argue that when birds came into existence the so-called junk bits of genes for teeth were already pre-programmed into their genes. Why? Possibly so that if necessary birds could later on develop teeth, though such rarely ever is seen.
And so the wheel keeps turning in the debate. But to many of us, Jan, it is a moot point as to which view is right insofar as to whether or not "a source for all existence exists," i.e. God.
If God created directly or if God created indirectly (by evolution), regardless, God (source of existence) still exists. To believers to deny that God exists would be to deny that existence exists, which is clearly illogical.
Going one step farther, that source provides many nice things for us like sunshine, food, water, a pretty planet, air, life itself. Any good father is a provider, a gift-giver. So it is also not illogical to call that Source our Father.
I can pinch myself and know it, Jan. Ergo, I exist. So do all we humans, whether we wish to argue against that too or not. Existence consists of both what is (matter, energy) and what is not (space, emptiness, non-materialism). It has always existed and always will. It or better described, He, acts just like a good Father.
Interestingly, the Hebrew for to be/being/existence is "hayah" from which is derived Yaweh or the short form Yah, also rendered as Jah or Jehovah.
I believe I have made my own points and now will sit back and see what others may say.