God doesn't need us to worship him. It doesn't benefit him in the slightest nor does it decrease from him in the slightest if we do or don't believe. But He has nonetheless set this criteria for us in this world to be successful in the next world. This is the reality whether we like it or not.
Karl Marx's theory on religion is stupendous. If you look at the founders of most world religions they were not interested in worldly gains or worldly affairs, they just wanted people to believe and be better people, to leave their wicked ways. If scriptures were written to unite people and build empires then the very founders of these religions would have only been interested in creating empires, but most of them were not (most prophets).
The laws set by these religions are moral laws, not laws on Internet fraud and what not. Having said that moral codes that are thousands of years old can still be of relevance today, for example, ensuring the Internet does not contribute to breaking up families, by having strict laws on such things as gambling. Even the laws we have today in Australia are what we call Common Law, which are laws that, though constantly changing, were inherited from hundreds of years of British law.
Religion encourages good upright behaviour and strong morals along with a strong family life. There is an abundance of benefit in religion.
Thanks for a thoughtful answer and that you didn't neglect the question. To answer;
(1) Sounds more like you're talking about Hinduism, successfulness in the next (life) world. But he doesn't care about us, he doesn't need us yet he grants us a second life and criterias to reach it. If I'm assuming your thoughts right. Sounds like he needs to make up his mind and ponder about why he grants us a second life at all. I'm curious of the criterias but won't allow you to constitute them. For sure stealing etcetera isn't on my table because I don't find it necessiry yet for most people in the world this is a necessity to survive. I wonder how strong these criterias are otherwise a very few people during the past thousands and thousands of years ought to have reached "a successful life in the next world".
(2) I still believe that religion is based upon two things. A need to fulfill for the individual human. A need of reducing uncertainty's, unite people, create a context, have some basic principals for what is a decent behaviour to create a better atmosphere. I would however as I've written in other posts disregard all the empires and people who has done things in the name of God. Since nothing is in the name of God. Even if there is a God, as you said, he doesn't care about worshipping and so on. So anything said in his name world be in vain and any action would be wrongly taken. I'm exhousted about debating these matters with other people who critize religion because of "the things it has done" when everyone knows that it simply been a beneficial tool at the moment. Although some religion founded due to making money, like the mormons, are giving fuel to this debate. Perhaps you're right but I don't think I entirely agree.
(3) Your correction is accurate, I do agree that they are today and has been regarded as moral laws. Moral laws to guide in every day efforts. Don't steal, don't kill etc. However I still believe that they are based on the laws, laws that are more than 10 000 years old that has been passed from generation to generation of successful religions. Today, yes, they are moral laws that most civilizations have based their laws upon. During the past 10 000 years in practice I do think they have been, in practice, been used and seen as laws.
(4) Absolutely. Depends on which religion we're talking about but in general religion has been very good to humanity and the single person. As long as religion is open minded and ensures everyone is as much part of it as anyone else. I'm of course referring to the Pope and the old guys neglection of almost the entire world. This is however not religion's fault but a few conservative idiots taking advantage of power. Religion is built on a very few words, good words, that are for the better of everyone weather you're gay, black or white, or whatever. Hopefully people will continue to have this view. Hopefully people will start act like the intentions of some has been and not fear their God. Fear will only divide, not unite unless someone is looking to unite a few and divide the rest. In short, yes you're right. One has to distinguish between the intentions of religion and the intentions of those using it.