All I will say to that is that I am a formally trained canine behaviourist with a background in protection and guard dog training, both military and civilian security dogs so let's leave this topic here as we clearly have different areas of expertise.
Are you suggesting that there is no genetic difference in behaviour between different dog breeds? The single most important aspect of domestication is to genetically alter animal behaviour, especially in animals such as dogs. This has been researched extensively in modern times and understood for literally thousands of years. If you want to have this conversation at all, you need to understand that genetics play a massive, fundamental role in determining behaviour, and there are massive differences within species, and there are plenty of natural and artificial examples of this.
My original point was that the way a domestic animal is raised plays a major role in their behavioural outcome as an adult, I was asking if we are saying Jungle pythons tend to be more snappy than other pythons in their younger life and if so does the way we treat them, ie interaction, feeding, and or handling, play a role in the overall outcome of the adult python, or irrespective of the way we act, are jungles just the exception with the majority being more naturally prone to "issues"?
Jungles are more predisposed, on average, to being snappy, than are most if not all other types of Carpets. Of course there is also environmental influence.
My young coastal was snappy and defensive when I first adopted him, through following your advice and leaving him be, he has now settled and become a much more relaxed and calm animal.
If I had continued to try and calm him through handling and "well intended harassment", I may not have achieved the same result.
That sounds like what I'd expect, you did the right thing, and it goes against the most common advice you'll get from most people.
Are we saying that a jungle will not "outgrow" this snappy or defensive type behaviours regardless of how we interact with them or like my coastal, can our interaction or lack of, assist in the adult behaviour of the reptile?
Not every individual is the same. Some Jungles will never grow out of it, some will always be calm almost regardless of what we do. Typically they're snappy and difficult to change. The typical methods people recommend usually make things worse.
Where I was/am getting lost is understanding the differences between morelias, besides colour,
I think being a newer keeper its easy to misunderstand that they are actually completely different animals not just different colours of the same.
People referring to Morelias in this way is inappropriate. There are multiple species in Morelia, though people sometimes incorrectly use Morelia as a synonym for Carpet Pythons, and even that is not clear or universally agreed upon. It's not a case of them being either identical or radically difference. The amount of difference exists on a broad spectrum. Some types are quite similar to each other, some are quite different. There are significant behavioural differences, thermal preferences and tolerances, dietary preferences, size differences, etc. The behavioural differences are far more than how defensive they are with humans. Just as one example, some of them are genetically programmed to go up trees, especially over winter (bredli perhaps being the best example), others will try to find ground or below ground shelter for overwintering. Some of them come from tropical environments where it is never particularly hot and never cold, others come from areas where they'll see snow and have to avoid ground temperatures of around 70-80 degrees celcius (which obviously explains why they would have different behavioural patterns, because what works in one area will be completely lethal in another). Some populations need to deal with certain predators which others don't, and if you're genetically programmed to interact with potential prey and predators in the wrong way, getting the behavioural response correct can make the difference between getting a feed or not getting a feed, or being eaten or not being eaten.
Morelia is a genus. Like, say, Varanus. Saying 'they are all Morelia' is a little like saying 'They are all Varanus' - consider that Varanus vary in size by orders of magnitude and include species which eat insects or large hooved mammals, living in the desert or tropics or wetlands. Carpet Pythons live in Mediterranian climates, deserts, tropical rainforests, woodland, swamps... just about everywhere. They have a massive and extremely diverse distribution.
But, ey, we're learning and that's a positive.