What beliefs would we consider reasonable for a self proclaimed Christian to hold?

[Whateverist]

Interesting point.  I agree with the good doctor that it is insulting to suggest that belief in the conclusions of science is on par with having faith in the articles of faith subscribed to by a religion.

But I agree with Drich that faith isn't well described as any kind of claim regarding knowledge.  I personally think of faith as trust in or reliance on that which you cannot demonstrate or completely justify.  I believe we all have articles of faith in that sense.  But that doesn't mean there is nothing at all that one can demonstrate or fully justify.  Not everything is on the same epistemic footing as religious faith, but some things are.  Science just isn't one of them.

why not?

can you explain every scientific aspect in which you believe?

"Believe in .." isn't an expression I use to describe anything I believe to be true.  Belief isn't something I toss toward things I wish for.  I believe always and only that which I have the best reason to think true given what I know and past experience.  I can certainly be wrong, but just no to that expression.

I'm inclined to believe the conclusions/theories of science because I understand the process which leads to them.  I know that the best scientific theory at any time is always subject to revision or replacement, but that is part of why I trust it.  My wife's grandfather was a botany professor received the best available medical advice available at the time from Stanford to treat his heart disease by increasing consumption of cream, butter and other dairy in order to lube the arteries.  We do have to depend on the research of others, not all of which we are likely to understand, in order to make real decisions.  But my money will always be on science for reasons clear to anyone who understands the scientific method and peer review.

I don't believe in supernatural things because I know those beliefs always and only stem from the murky hunches people cling to, either because they were brought up that way or because they misapprehend the 'internal otherness' of the unconscious mind and project it out there - way overestimating it in the case the xtian god.

or is there a measure of faith involved to accept that the whole universe was condensed down to the size of a basket ball before the big bang?

I doubt if anyone invests a great in that sort of speculation.  It is interesting but not useful for any decision I make in my life.  But there are plenty of more down to earth empirical matters I rely on all the time, and I take those from science.  If I was drilling for water, I wouldn't bring in someone with a divining stick, I'd contact a geologist or engineer with the relevant experience.

Faith is faith when it comes to God/not religion. (The faith religion calls for is bunk.) God said all we need is the smallest amount and we can move mountains of doubt with what He will show/do for us.

You think you're better than the religious because you go directly to God rather than trust the officialdom at the temple.  But so long as you start out assuming you already know what God is, what He wants and how much that should matter to you .. meh, no difference.