Looking at the statistics, it would appear that most polls, such as Realclearpolitics were not that far off. That is the actual vote was within the error bounds of +- 2-3%.

It looks more like the media took & ran with whatever bias it had, to project the winner.

As far as the 1st Christians being wiped out, after 70 AD, they seem to have thrived, with exceptions to brief periods of persecution. 

More contemporary opinion on composition of the gospels, appears to support earlier dating, to  within a generation of the Resurrection. Hence at least two gospels were penned, or dictated by eye witnesses.