You said, "With so much at stake concerning the impact that divorce and remarriage can have on families, it is essential to be diligent in understanding what the rest of the scriptures teach on this topic."
I agree with what you've said in the above quote.
That is why I'd challenge you to read Jay E. Adams' book Marriage, Divorce, and Remarriage in the Bible - A Fresh Look at What Scripture Teaches, published in 1980. It is only 128 pages.
One reader has stated, "Other than the Bible itself, this book is remarkable in its comprehensive look at the sin of divorce. While it is certainly a "quick read" it is very thorough and, in my opinion, the very best on the topic."
Another reader,Phil writes, "One of the most outstanding things about this book is that it not only presents the author's viewpoint, but also addresses and dismantles the claims and assertions of most opposing viewpoints. He goes verse by verse, in whole context, and not this "single verse theology" or Scripture hop-scotch that so often flows from the anti-remarriage crowd. He does this with great research from a variety of other authors (all Christians of course), including historical as well as Greek and Hebrew language background information. Tons of footnotes and references are included."
Rather than condemn ALL the remarried to the lake of fire, do a diligent research of the scriptures,"...in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction."
Of a truth, there are some " Desiring to be teachers of the law; understanding neither what they say, nor whereof they affirm. But we know that the law is good, if a man use it lawfully."
May we be taught by His Spirit to use His Law, Lawfully!