Great.
1) The place where you are born and live is a major factor on determining your religion - This means that people inherit their religion, just like the local culture, from their surrounding society. The generic theism is part of a long western tradition.
Although this can be true, as in, for me personally, I do follow a traditional theistic religious paradigm /to an extent/, this is not actually an argument against theism. It might be, at best, an argument against exclusivism, however exclusivism seems rare at least on the forums, so, it's not like you would be convincing anyone to change their beliefs. Note, I have a thread or threads about salvation, /a common Xian religious theme/, and very few people who responded actually thought that it was ''Xians only'', in this aspect of religious belief, or Xian belief.
2) We already reject other ( beliefs in ) gods - It is not like there is only one kind of belief in god. Most people reject multiple pantheons and treat them as fiction, merely because they weren't raised in an environment where those gods are treated as actually existing.
Sort of. I reject certain ideas about gods, or such, not really just rejecting a deity because it goes by a different name. Yes, this is a tradition, for many, but so what, this again is not an argument against the existence of deity, merely a semantic belief that is cultural, linguistic, and specific, when related to different holy books, etc.
3) Dubious miracles - One thing that sets apart Moses, Jesus, etc. ( prophets ) is their ability to perform miracles. However, it is impossible to determine whether those miracles actually happened.
Not sure. You can't prove anything either way, so they only remain ''dubious'' to an individual, ie it's an opinion.
4) No need for God - God is not required to explain any event that we know to have transpired.
Actually, a creator is needed if you want to get past the glaring non-argument of things poofing into existence from nothing.
5) God has not been proven to exist - This should go without saying.
True. But many things have not been proven to exist. Perhaps we aren't looking for proof, because many things you cannot prove, yet believe.
In other words, religion is a cultural phenomenon that doesn't depend on establishing the truth of its claims to exist. I hold that if we are unable to substantiate the existence of said God, then there is no justification, within the realm of reason, to believe in it.
Ah? No, I do expect people to establish their credibility. Many churches do not, I understand that, however the churches and such do not ''speak'' for religious ideas, neither does academia. Substantiation is subjective.