We can prove that omnipotence is a logical paradox.
Omniscience is a bit tougher to tackle, but there are some good essays on the subject that seem sound enough to me, if a little more complicated than "microwave a burrito so hot that <insert name here> cannot eat it".
Without either, the term "god" seems a bit of an overstatement to describe a being.
Parents can't force belief on someone, but they have the power to force a lie out of someone or face serious consequences. Forcing a child to choose between lying (about something as personal as religious beliefs in particular) or food/housing/happiness can be extremely mentally damaging to a developing mind, and is tantamount to child abuse.
edit:
Final thought for the night
If parents have a right to force religion (religious actions, at the very least) on a child just because they live under the same roof..
Does that child, when grown up, have the right to force atheism upon his/her parents if they should not be able to house themselves later in life and move in with their kid?