Truth is subjective or objective. Morality is subjective or objective. The gospel is subjective or objective.
If any of these things are truly subjective, then they don’t ultimately matter. They would only be opinions.
In this short article, J Warner Wallace of Cold Case Christianity explains why a subjective gospel will not do.
Treating the Gospel Like a Cookie Rather Than a Cure | Cold Case Christianity
Whenever I visit a college or university to give a presentation, I make an effort to talk with students in the local Christian groups that are active on campus. These students often discuss the apathy that seems to permeate the Christian culture in universities across America.