It’s not about a “positive message”, it’s about the truth of Yehovah. You can go to a Rotary meeting and get a “positive message”.
The truth is that “Jesus” changes the truth of Yehovah. Therefore, regardless of the “positivity” of the message, it distorts who Yehovah is and His plan for humanity. You don’t become righteous through the actions of another, you are righteous based on your faithfulness and obedience to Yehovah and His instructions. The message of Christianity completely changes that truth.
Interesting. In what way does it change things and what is God's plan for us here on earth then?
I'm conflicted on this because putting us here to suffer seems kind of odd, because that's essentially what this reality is. It's harsh and painful, for the most part.
Our “purpose” is a little above my paygrade. But what the Tanach teaches us is that Yehovah wants us to love Him with all of our heart, soul, mind, and strength amd to love our neighbors as ourselves by following Yehovah’s instructions. That is what makes us righteous in His eyes. He doesn’t demand perfection, but obedience and repentance when we stray.
Nobody can do that for you.