Didn't Nero launch Christianity?

[Acrobat]

No one's read Marcion's gospel, nutter.  It didn't survive.  It's hypothetically reconstructed by reference to other authors treatises against it and it's declaration as heresy.  

The character he believed in is the mythical christ, he explicitly rejected the equally hypothetical historical jesus, along, ofc, with other things important to christianity as you know it today.  You really really really really believe that a god walked the earth, marcion also believed that a god walked the earth.  That is not what the term historical jesus refers to.

Lol, so much of Marcion's Gospel has been quoted by his critics, that almost the entirety of his Gospel has been able to be reconstructed. 

Now here's the thing to reveal you continued dishonesty, if you want to exclude the writings of his opponents as you suggest, then you're left with nothing, nothing for you say about anything Marcion believed one way or the other. But you apparently want to have it both ways, to cling to elements in these treatises that you imagine serve your conclusion, while trying  to hand wave away the bulk of which negates your conclusion. 

This is just confirmation bias and cognitive dissonance on full display folks.