Does anybody understand How Big Bang happened?

No, I don't.

Uhh... It can expand from a point. In fact, it is expanding more slowly than in the beginning. Right now, it is expanding at about twice the speed of light. Btw, the big bang did not happend from a point. It happened with negative space. Think of the size of the Universe as a sinewave. When the Universe began, its size was actually smaller than a point. In other words, it was negative space. When it started expanding, it really was contracting into a point, and then started expanding. So the Universe really didn't start from a point after all. And it wasn't a bang. It was more like a negative squeeze.

The real point is this: No human really knows how the universe began and probably no human ever will. Did God create the universe? Human beings would have you believe that the universe and everything in it were created by "God" for the humans. Humans don't have a high opinion of themselves, do they? Remember, we humans created "God" (of some form or other) about five thousand years ago. "God" did not create us in his image; we created "Him" in ours. Human scientists can come up with some pretty esoteric theories that may allow travel over long distances in space, but it's doubtful that it ever will happen. Travel, even to the nearest star, other than the Sun, is probably never going to happen. Even if we can travel within our galaxy at some point in the future, it is almost a certainty that we will never travel to other galaxies. Big bang or no big bang, we will never really know for sure.

"religion is based on faith, right?"

Yes. Faith is belief without knowledge, or in spite of knowledge. ("knowledge of things unseen" according to St. Paul.)

To posit that God did this or that, stops all argument, all debate, all alternative theories. It used to be, before the Age of Enlightenment that all knowledge came from the Bible through faith. Consequently the earth was flat and the historical period was called The Dark Ages.

To posit that God did this or that, including that He created the world for his pleasure closes the mind of the faithful and makes contemptable the scientific study for natural answers in a real and actual world.

The faithful are not astonished by new scientific discoveries but look upon them as only additional ho-hum miracles. Such a debasement of human intelligence robs man of the credit for his greatest asset- Reason.

The term Big Bang is used both in a narrow sense to refer to a point in time when the observed expansion of the universe (Hubble's law) began — calculated to be 13.7 billion (1.37 × 1010) years ago (±2%) — and in a more general sense to refer to the prevailing cosmological paradigm explaining the origin and expansion of the universe, as well as the composition of primordial matter through nucleosynthesis as predicted by the Alpher-Bethe-Gamow theory

The Big Bang is just a way of misleading someone from the ultimate truth which is God created the universe!

If you think the issue of God is religious, think about that a moment... religion is based on faith, right? And faith is believing something, therefore I believe it takes a whole lot more of faith to believe in the Big Bang or evolution then it is to believe in God creating

I give two thumbs up on this one!

"There is just simply NOT enough information on it's origin."

The word is theory. Look it up. People misuse it all the time. And whats worse is they seem to forget about it and use the word Fact in it's place a lot also.

Think of a funnel through a single time space point.

Well it seems to me that you don't have any better ideas, unless you're hinting to religous origin, which from a scientific perspective is an even bigger load of crap.

If Einstein was alive, he'd have been so proud of you!

Right now, physicists don't know....but they're still working on it.