Well there’s a very vocal Septuagint crowd out there, somewhere between 5 and 10 percent of the DSS biblical manuscripts could be called protoSeptugint probably closer to the 5, half to 2/3 could be called protoMasoretic. You’d never know it from what you read on the web though.
Take Isaiah A, it’s in just amazing agreement with the Masoretic text, yet mostly what I hear about is one place where it supports the Septuagint.
I think that what is perceived here is due to a modernistic translation being made of DSS, which is to be expected, and that being compared to the Masoretic, which, compared to LXX, is modern.
There will also be a tendency of pro-masorites to read the ancient text in a pro-masorite style, and for the pro-LXX to read it in a pro-LXX style.
I noticed this form of artefact when reading H. W. Hogg’s translation, from Arabic into English, of the Vatican manuscript of the purported Diatessaron. His work looks and reads like a KJV style translation, and is full of Latinistic constructs, which would not be expected in an Arabic source. Hogg was a clergyman, steeped in the dialect of KJV, and he would naturally have had the KJV phraseology floating through his mind as he translated an equivalent passage.
To be fair, the DSS should first be translated Alexandrian Greek, and compared with LXX in that language.
Yes, as I understand the Isaiah passage, the intent was this:
A virgin will become with child, (quite by the natural cause of things, by ceasing to be a virgin), and bring forth her first-born.
Thus the emphasis is upon this being her first experience of the process, and so expressing the wonder of it.
Other people have read into this passage according to their beliefs, or lack of them.
When you find 66% support for Masoritic, is that not also the same 66% that supports the LXX, for over 95% of LXX is identical with Masoretic?
We need to be certain that you are only comparing points of dispute, and that these are real points of dispute, not just new interpretations of the same substantives, as in the case of the virgin.