Says the man who can’t justify his position.
You claimed that Marcion and Valentinus didn’t qualify as Christians because they denied the historicity of Christ, which is a criterion I’m not even sure I agree on, since many early Christians believed in Christ spiritually but not physically, but when I gave you the opportunity to show me that these two men actually denied the historicity of Christ, you had a hissy fit in place of doing so.
So your (dubious) criterion for tr00 Christianity, even if accepted at face value, doesn’t bring us to the conclusion that Marcion and Valentinus weren’t real Christians.