I think the google ban is being used as part of the existing FUD around Mt. Gox.
I believe so, it could be the Mt Gox talks + Google bans that caused people anxiety and slowly sell their holdings
and that was spread by a handful of people

so that they can buy bitcoin with cheaper price
I do think we'll hit a bottom soon because there doesn't seem to have been significant enough news to cause this large dump.
I don't understand this part.
Why would there be a dump if there is no significant news? unless I misunderstood that sentence
IMO having no news on bitcoin would only make bitcoin price to stabilize, not dump or pump
My thinking for the second part kind of ties in to your reasoning for the first part. Bad news is spread and blown out of proportion and the FUD then allows people to manipulate the market for their own gain. Therefore my point was that I don't think the news is significant enough to subdue the market long term, just enough for it to be used for manipulation.