The birth of religious morality and traditon is about securing the resources; human, food, water...etc. When these poeple define themselves as 'theists' and declare or believe in that their [moral] judgement is based on their believer vision or faith they are actually refring to something that doesn't exist today in this age.
How could have religious morality been born? I have no idea...let's caricaturise it. Before agriculture, you punish everyone who enters the place where you get the best driable nuts, roots and muhrooms with a violent, ritual death penalty in front of everyone and declare the garden 'sacred' because you can't make every individual in the clan sit down and understand that if they randomly comsume the resource, it will put the whole community's life in danger.
It's like trying to teach a 2 year old toddler that he shouldn't walk up to the log burner and touch it because he will get burnt and it will hurt very badly. You cannot 'explain' that to him. You make silly sounds imittaing burning and feeling pain for example. And take every caution so he wouldn't go near the logburner. And highly likley, at some point he will go and burn himself anyway. Well ancient people are not 2 year old toddlers of course, they just don't have systematic knowledge and so they created traditions and religions as precautions. That's why it is immoral and selfish to eat the nuts by yourself, and endanger your clan, not because it is against 'universal' morality'. Because it has practical real lfie consequences. And nonbeliver or believer alike, people will come to the same conclusion.
There is no tradition or some religious rule that wasn't born out of some neccesity of survival for some time and consequences. Most of them look moronic, violent, genocidal to us today because we don't need them anymore. We don't need to store the nuts and ration them if you will. Then why don't/didn't people abandon all of them them? Well, they did. But then for the remining bullshit, it is easier today to live with them as if they do work compared to the time they were invented and worked. Because there are no real life conseuqences for them. It's just political bullshit.
OK, go back. Let's say it is a fantasy world, and we can actually make the whole clan sit down and understand. "Dude, don't go to that place and pick the nuts, OK? Because we need to pick them in a certain time, and store and then ration them in winter. Otherwise we are all gonna die. No, way around it. Don't fuck it up." And they got the point.
The thing is, we can be sure they will do it -did it- many times over anyway. That's the thing -especially- with the sapient lot. And they won't just do it for 'selfish' reasons either. They will think, there should be a better way around this system, better for me, and better for the clan while it is actually again about themselves, the self. But then, thank fuck they had done it, forced it again and over again, because otherwise we would have still been murmuring 'don't pick up the nuts' in a catatonic state. But it is about the self isn't it? This piece of shit sapients are highly likley the most self centered, agressive human species ever evolved and they adapted so successfully, their reflection and projection of the self desire to the mass scale has become their only categories. Was that the only way to survive? Probably? Maybe? I have no idea. We probably have killed every other human species, ate them and breeded over with the rest.
So that's the root of religous morality. A person living in a moderate society with some sort standards, law and some social order today, cannot have 'religous morality'. He certainly can believe he does, voice it, but in practice in real life, it is very limited. If he goes out and defends the original religous rules and 'laws' or try to act on and apply them, he'd get arrested.
Anti-vaccinators. We keep naming them along with religious groups. Are they really overwhelmingly religous? I doubt that. If they are acting according to the scripture, is there anything against vaccination in any part of Christianity? What is it? How did this thing start? They are stupid and ignornat...is that all? Yes they are stupid and ignorant. But then vacccination is not mandatory in the US, and those people have born into a society with a ridiculous understanding of freedom which is constantly advertised by the culture, the state...etc, along with a ridiculously inflated sense of American identity that is not compatible with professional standards of modern society. The rest is pushing the piece into that large circle whole, everythig fits in it...any kind of conspiracies...etc Bottom line, it is not that they believe in some religious or moral principle in the first place, they just do not believe anything bad will happen as a result. It's much simple. Because frankly, bad things happen to people in other countries.
Remember the 'gay wedding cake' conflict? Supreme court ruled for the baker and tons of people (dem, repubs, believer/nonbeliever) agreed that it made sense because he should be able to decide who to sell in a democratic country with religious freedom. It is not. It's idiotic. It was the most antidemocratic thing to do for the society.
Basically, the 'clerics' told one member of the 'clan' that he can pick the 'nuts' whenever he wants because there are so many nut trees anyway, and gave a licence to everyone who wants to do the same thing. There isn't enough amount of 'nut trees' in the world to support this idiotic principle without undermining any democratic system. Does it have anything to do with religion or freedom? No, it is a political judgement. There are 320 million people in the country and 'vritually' there are no real life consequences of this, while there is a need of some balancing propaganda after legalising gay marriage, it is pretty much nothing but feeding the other side a bit with 'there there'.