Yes, modern Christians will reject the OT except when they find it convenient. Essentially they don't believe in Yahweh, but rather worship Yeshua as their God. It was not always this way. It seems the change became dominate about 25 years ago. Protestant Christianity is a very different religion from when I grew-up.

To many Christians the old testament doesn't count. It only shows their selective mentality. They only know about certain parts of the new testament as well. It's why so many atheists 'saw the light' after reading the whole rotten book.

If Christians do quote the old testament, it is usually because they don't understand the context in which it was written. For instance "An eye for an eye and a tooth for a tooth" is oftne used by Christians as justification for revenge. However in context, it was actually a limitation on revenge itself, to prevent the escalation of violence. Before the rule/law, for slight offenses, in revenge people would wipe out enire families. I suspect the elders saw that if revenge was not limited, that it could lead to their entire tribe being wiped out when those who revenge was made seek their own retaliation.

Anyway, that context is totally lost on modern Christians.

The Torah/Old Testament is very blood and guts, so it's very popular with Far Right Christians. Not surprisingly these same Evangelicals tend to be pro-Israeli Occupation but still hateful of the people they consider to be Christ Killers.
Religion is such a weird and tangled mess of the basest parts of human nature. Best to be avoided.

Sure, especially when advocating for really hateful crap like gays being abominations, for example.

They like having a big book which has many different views, because then you can find whatever you want in it.

And it should not be forgotten that even the new testament splits into several quite distinct parts. The writings of saint Paul which probably were written first, the Gospels, Acts, and the Revelation. Generally speaking the Christians tend to prefer, and only know, the gospels, because the stories are easy to understand, and most christians wrongly assume that the Gospels came first and inspired the others.

No idea. I can say though however, that many of the hard right “evangelicals” swear by the “King James” version of the new testaments, claiming it is the closest one in comparison with the old….

When self-proclaimed christians cite "the bible" it doesn't mean any actual book. They are citing the stuff that comes out of a chosen preacher's mouth.

American Christianity is a self-made religion. You shop around looking for a pastor that says what you want to hear and just call that "gospel".

As I understand, the old testiment does not include all writtings that could be considered from the national archives of the nation Israel prior to 2000 years ago.

The old testiment laws are antiquated and to my knowledge the nation of Israel has a different jurisprudence in modern times.

Apart of understanding the corrilation between old and new testiment is giving documentation of the "messiah " , Jesus and how his new testiment purported life is connected to the old testiment.

If you get into understanding meme as coined and defined by illogical atheist and BRILLIANT biologist Richard Dawkins, you would begin to understand the biological nature for Jesus of the new testiment.

Prophesy is a type of meme. The thing that made Jesus of new testiment the "anointed one" or messiah was that his life was the meme of the old testiment laws and prophets coalesces into the new testiment life of Jesus.

It's like the movie "Stranger than fiction ", with actor Will Ferrell (2006). To understand the biological nature for Jesus of new testiment and understand what controlled Jesus in new testiment, you can sample the movie. As a particular example of how the author's words in the movie controlled or dictated how the character, played by Will Ferrell, was forced to do what the author wrote.

Christians will often quote from the old and new testament, often out of context to argue/defend and sometime abuse non-christians for questioning their beliefs.

The Old Testament is more about god's wrath.
That's where the most frequently told bibles stories come from.
Adam and Eve, Noah and the great flood, Moses and his adventures, etc, etc.

The New Testament is just an "updated" interpretation.

It's ALL fiction. Just like every other "holy" book.
None of them should ever be considered a historical reference book.

They definitely use the old testament when it fits their narrative of the people and behaviors that they should hate. Gay people? Use the old testament. Women of "ill repute"? Old testament. Sex outside of marriage rates the old testament, as does unmarried pregnancy.