When you tell people that, if they don't believe your specific ancient story/mythology (out of several thousand different religions currently "believed" to be true by their followers), despite no objective proof that said ancient story is true, they are going to eternal hell, well, some people don't take it nicely.
And when those people quote their own ancient story/book as their evidence of said story/book being true, well, again, you're gonna get a few eye rolls.
It is impossible to have a logical discussion about something that requires faith to believe.
While not impossible, it's very difficult to have a civil discussion about something that requires faith to believe unless everyone involved has the same beliefs.
I read your statement as presupposing that there is no objective truth in terms of spirituality and religion and that all religions are social constructs. There is evidence for Christianity. It is from this body of evidence that Christ and then the Apostles taught. They did not appeal to blind faith but logic and intellect. It's unfortunate that most "believers" project their faith as nothing more than a hopeful wishing rather than an objective reality.
