The word 'explosion' is one I would avoid for the Big Bang. It was a sudden coming into existence of all matter/energy (same thing, according to Einstein's theory of relativity: E=mc2) and space-time itself. This is very different to a chemical explosion. This 'hot space' then rapidly expanded, and is still doing so.
Ask 100 scientists what caused the Big Bang and you'll get many different answers. The most frequent one is 'we don't yet know'. Many of the current possible theories are fiendishly difficult for non-mathematical thinkers to understand, and most are not (yet) testable, so making them philosophical and not scientific. Reading up on quantum theory would be the starting point to understanding these.
So there is still room for a religious view fitting in with our current scientific knowledge - God triggered it. However, the concept of 'God' and arguments for the existence of something beyond the physical world seem to have changed continuously to keep up with our expanding knowledge, so it might as well be replaced with "stuff we can't yet explain".