Does the Bible have to agree with itself for it to have lasting value?
If it does, then it is completely worthless, because the Bible does not agree with itself (despite rationalizations to the contrary). I don't even think the OT and NT people worship the same God; the God's personality is strikingly different from book to book and very much so from OT to NT. The consistency is imagined.
That said, consistency is overrated and only important if you wish to rigidly base your life and world view around every verse therein.
If, on the other hand, you value the reasoning ability God gave you more than the reasoning ability God gave to a bunch of primitive peoples, then you take the good from it and appreciate it and ignore the stuff that's obvious crap.
Which brings up another point/question that I may make a thread about. . .