I think you're confusing blind adherence in materialism to healthy scepticism. It's one thing to search for a natural explanation (after all, a natural explanation is more likely than a supernatural one), but I agree that it's wrong to dismiss any supernatural explanation out-of-hand. That's why I reject the idea that science is inherently naturalistic (or, more accurately, reject the distinction between 'natural' and 'supernatural'; there are simply phenomena).
No I'm not confusing those; I think religious people naturally have, and should have, a healthy scepticism too. Many occurrences of miracles in the Old and New Testament are met with scepticism from the witnesses. But you mentioned "undeniable" miracles, I was trying to make a point that such a thing would be very hard to come by. For example, the parting of the Red (Reed) Sea. The future children of those who crossed the sea would only have knowledge of the event the same way you and I would: being told about it, and they could choose to disbelieve it. Even some of the eyewitnesses may have attempted naturalistic explanations of a body of water defying gravity and parting, as some people do today (just from TV shows I've seen 3 or 4 different natural explanations offered). But if I agree that it was an undeniable miracle, even then it was so for a relatively small number of people, and only during their lifetime.
Acknowledging that a miracle occurred doesn't mean you can't complain about it, or that you see it as any less divine if you do. God could spontaneously set my room on fire, and I'd be forced to concede that that is, indeed, a miracle. But that doesn't mean I can't complain about being set alight!
And calling the Dunkirk Evacuation the "Miracle of Dunkirk" is a) overlaying it with unnecessary religious overtones (which I think Wikipedia has a policy against),
Well when I start my own encyclopedia site I'll have a policy against unnecessary materialistic overtones.

Seriously, my point is sort of based on what I think may be an idea behind your OP, that you think maybe God should perform in-your-face miracles today, and my point is that the Bible is a story of miracles, but it is just as much a story of how easily humans forget, ignore or disregard miracles. Read Psalm 78. And consider Christ's parable of the vineyard, in which the sending of prophets over time doesn't keep the people faithful, so God says, finally, "I will send my Son".
But within the last few years: a cross is tossed into the Jordan river and the river flows backwards; the Holy Fire lights itself once a year in the Church of the Holy Sepulchre; a cross appears in the clouds over a Russian city; a man in New York falls 47 stories onto concrete and survives. I could go on. So how do these affect your life? What's your response? I assume it's either "that didn't happen" or "it happened but there was a natural cause".
and b) an exercise in statistical ignorance. Of all the military operations that went on during WW2, a small fraction are bound to have an unusually good casualty rate. This is simply a consequence of repeatedly running a normally-distributed trial.
It was only a 'miracle' in the 'what a fortuitous turn of events!' sense. What most people consider to be actual, religious miracles is something quite different.
The miracle primarily was that the German high command simply ordered its army to stop, right as the German army was about to win the war. You know, your national anthem asks God to save your Queen. Then when He does it, you ungratefully say "meh, we got lucky".
