So we know that by baptism all sin is washed from us... and is accepting God so to speak... if babies are too young to do this, and they cannot accept Jesus into their lives, then they too must go to hell..
Nope, nope, nope!!
See my above answer about babies and where they go
But as for infant baptism, its pointless basically. What is baptism for a start? Its a public expression of your faith and your descision to follow Christ in your life. The water symbolise the washing of sins, when you go back it symbolises death, and when you come up, it symbolises new life! Its not a magical thing where you instantly become a follower.
So how can a baby know this? A sprinkle of water doesn't put babies in heaven and indeed, when they grow up, it doesn't mean they will go to heaven either. Everyone needs to make a person choice which you can only do when you are older.
Again, there is NO scripture which tells us to baptise children.
So when a child grows up to accept Christ, God commands that they be baptised. Having been baptised myself, I found it a very close and persoanl experience and it made me happy to do as God asked.. regardless of it being just symbols.