Turgy, you have raised a very important issue here, and also pointed to a very interesting and relevant paper - again, on your favourite website!
There are now "liberal" or "neo-orthodox" or "revisionist" (whichever word you like) so-called believers in probably every Christian denomination, as well as the non-believers who spurn Christianity anyway. In fact, it seems to me as though the old division of Roman Catholic and Protestant is now less of a division than this more recent one of revisionist and orthodox (traditional, conservative).
The difference between these two newer divisions seems to be the infiltration of postmodern philosophies with an armament of moral relativism, multiculturalism, pragmatism, utopianism and a "this world" perspective. Essentially postmodernism rejects any notion of a universal, overarching truth and reduces all ideas - including traditional Biblical Christian truth claims - to social constructions shaped by gender, class and ethnicity. The argument concerns the "knowability" of objective truth.
I think the concluding paragraph in that paper by Eric Vestrup sums it up the problem very well, and I quote it here:
By summarily rejecting theses (a)-(f), we Christians do not have the modern "enlightened'' frame of view on our side. Nor should we expect the world in general to recognize the soundness of our position, for our position is that of the Scriptures which condemns worldly thinking in such matters. Yet, we should know that despite what most moderns and even some wolves in minister's garb teach from the pulpits, the historical and theological case for Christianity is no more unreasonable than the underlying assumptions of modern neo-orthodoxy. Our faith is founded on empirically unprovable metaphysical statements no more than the modern critics, who a priori place their worldview as judge over the text of Scripture. Yet, ultimately, even though we can support our position logically and can offer sound and historically grounded apologetics, we must cast all appeals to human logic and pride aside and state that it is not the evidence, but the gracious testimony of God the Holy Spirit which calls us to faith and lets us believe. The secular scholars have the "rational mind'', but the believers have both the "rational mind'' and the testimony of God the Holy Spirit in addition. Noting this undeserved advantage on our part, this essay ends.
There are times, but not always, when I have found it can be rather meaningless debating over Bible truth claims. That occurs when there is no shared common reference point. It occurs more often for me with revisionist "Christians" than with non-believers who are more likely to be Biblically illiterate and confused over what Christianity is about. The argument you mention -
a loving God would not condemn someone to hell - is exactly a case in point, a lack of knowledge and understanding regarding God and our human situation. However, if I and the other differ in opinion over the nature and inerrancy of Scripture then any use made of Scripture has to be with great care. It may be necessary to debate on more philosophical concepts - what is truth, can we know truth? etc. There is a lot of good apologia available to counter arguments put forward on authenticity and reliability of Scripture, on the historical reality of Jesus, evidence for His physical resurrection, etc, but if I am hoping for some kind of quick conversion to orthodox Christianity when there is a lot of resistance and no motivation or desire in that direction, then I am usually disappointed. It is more like chipping away at a rock which has little intention of being chipped.
However, having said that, I also believe that presenting the Word of God is an important part of bringing someone to Christ and must not be excluded. Hebrews 4:12
For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart.
Turgy, you might be interested in reading another paper concerning the
Barriers to Salvation by Dr Hugh Ross. I think that very often the obstacle to belief (orthodox Biblical Christian belief) is not so much intellectual but moral instead, and that is to where the focus needs to shift. After all, how supremely
arrogant of us to put God in the dock and criticize and make judgements about Him and His ways. Maybe considering these obstacles will give you some idea of the kind of "sound bytes" that need to be devised in response to the heavily fortified brick walls with which both revisionists and non-believers surround themselves.
One of the most important things you can do is be praying for the guidance of the Holy Spirit as you discuss these matters with others who are resistant to the truth of the Gospel. In the end it is the Holy Spirit who will convict the other of the Truth, and that indeed is His role rather than your own.