There are still literally millions of Christians who do not accept evolution. Here are some depressing survey results from the US. Do these people not count as "thinking Christians" to you? I suspect they'd strongly disagree with you.
You are right in saying that evolution cannot answer the question "why is there something rather than nothing." But that's because that question has nothing to do with evolution. The science of the origin of the universe is cosmology, and the science of the origin of life is abiogenesis. The wikipedia articles I've linked to give a reasonable overview of current scientific thought.
But you're right in saying that science hasn't got any rock-solid answers for both the origin of the universe and exactly how life started on earth. There are a number of theories and, so far, the evidence suggests that certain of those theories are more probable than the others. But that might well change if evidence appears that contradicts those favoured theories. That's how science works, after all - you observe something, you come up with ideas that might explain those observations, and then you come up with experiments that might prove or, more accurately, disprove those ideas. If, despite years of trying, no-one is able to come up with results that show a particular theory to be wrong then that theory becomes regarded as almost certainly correct.
How is it philosophically ignorant to question the existence of god based on lack of evidence for his existence? Are we not supposed to question his existence at all? Or are we only supposed to do so within very narrow confines of allowed questioning?
If god wants us to know him and to love him, why is he so elusive? As an omnipotent being he could write "GOD EXISTS AND THE KJV BIBLE IS TRUE" in the clouds so that everyone could see and everyone could discover the righteous path. But he doesn't. Why not?