The earliest disciples didn’t use the Gospels to learn about Jesus. If they weren’t eyewitnesses then they relied on eyewitness preaching and testimony and the Holy Sprit and transforming and arisen Jesus did the rest. The Gospels were written ca. 70-100CE. Paul had already converted all sorts of people without a written canonical Gospel. And later on, anyone who used Mark or John or learned about Jesus from them may have had no idea of the virgin birth. Whole streams of thought in the NT and early second century evince no knowledge of it. By the end of the second century the fourfold Gospel was becoming well established in what we not call Orthodox circles.
Not all Christians in antiquity were converted by the written NT Gospels. This is so plainly evident by Pauline communities. It would have also been nice if Acts could have told us about all these written Gospels from the eyewitnesses that were traveling around and being used to convert people to the faith. Would have been cool for Jim’s to relay that Mark wrote a Gospel at Peter’s behest and converted many with it. Not a shred of evidence for it despite all Luke’s work. Instead his prologue in Luke critiques Mark which he utilized as a source.
Not to mention that not all Christians used these Gospels (e.g. Gospel of the Hebrews, Gospel of Nazarenes et al). Oral tradition and preaching was the norm. The apostles were eyewitnesses to his ministry, not a virgin birth. Whether they knew of it or not is what we are discussing. Well we aren’t discussing it because you are just assuming it is factual and it’s factual most Christians knew it at the time. All I can do is repeatedly ask you why you fee this is the case and hope eventually you might provide the slightest shred of historical evidence for your opinion here.
Your apologetical question: “Why would they die for a lie about the virgin birth?” is fake news.
Vinnie