I think it isn´t too hard to understand what Alpha says. Besides the fact that there is no prove of a person having existed as Jesus, but the fact that at that time it was very fashionable to be a prophet and many declared as such ...
It is clear that the heritage being conveid of a fictive or howsoever real person named Jesus has been totally misused by the ones claimed to be his representatives.
They brought prudery in advantage of better economical exploitation over the people. They always made deals with the feudals, they faked documents to tighten whole landscapes all over the world, they caused countless cases of injustice, wars and the fatal subjectivity that is uppon destroying the globe with an incredible ignorance related to mens intellectual capacities. The catholic church still is the wealthiest organisation on earth and hasn´t stopped gathering yet while still preaching modesty.
Doubt on all this if it makes you feel comfortable with believing, but don´t jump on someone who regards the facts.