@BillRM,
Well, Bill, I really thought curiosity was innate in humanity - but, there must be exceptions. Indeed, why do you then ask what do all those things that happened so long ago have to do with anything today? You don't really want to know, dear soul, you just like all this attention, these waves you are causing. Since you don't know anything about those happenings, those people, why ask anything at all. You are being mentally lazy.
But, I love the stacks and stacks, dozens and dozens of books I've read on the subject over the past several years, actually since about 1960, so I will say this: It took reading uncountable numbers of books to come to the realization that any and all people who robbed & killed over religions are really after ever more power, sex, treasure and land.
Example: The Catholics (assisted by Royalty) who had the Inquisitors kill every last one of the "Cathars" never knew that these were the people who were taught by Mary Magdalene and the others who sailed across the sea, from Jerusalem to France, to live among them. (The "others" included Lazarus and Martha, who were brother & sister to Jesus). The Cathars were extremely wealthy, as they were highly educated and worked hard - actually, nobody knows how they got so rich. Did you know, Bill, that the Knights Templar saved most of the treasure (coins, I'd guess) owned by these Cathars, and somehow managed to carry heavy bags of some sort down those mountains (I'm assuming they lived in the French Alps).
Most people don't know, maybe, that the Templars were on the side of the Cathars. Did you know that we would know nothing about the Cathars if the Inquisiors didn't keep such perfect records of all the millions they killed?
You don't know any of these people, Bill? You don't care to? How very odd that you think history doesn't affect your life. You might be surprised by the beliefs of the Cathars - you could probably understand them more than today's religions.
Did you know, BillRM, that Joseph of Aramithia (you remember don't you, the fellow who gave his tomb to the family of Jesus for his burial?) was sent to England to teach there, just as Paul was sent to Rome?
I have all faith, Bill, that you will some day develop a little curiosity about the world you live in, and understand why knowing history could assist you in understanding yourself a little better - never mind your fellow man/woman.
When I graduated from high school I didn't know much, but I educated myself through reading, and later attended college. But, my greater education came from the reading after college to the present. And, incidentally, I don't think people, or religions today should share guilt of what their ancestors did. We can only live in our own time. I'm part Native American but I don't hate descendants of the cowboys