The idea of "contextualization" by adjusting Christianity to existing beliefs, values, and traditions was probably the twentieth century's most significant contribution to ministry strategy—and it is not a good one. It has made the church indistinguishable from the world, indistinct in its message, and (frankly) ineffectual as an evangelistic force in an unbelieving culture.

You can find the whole article at Pyromaniacs.

Likewise Mark Dever in the book A God Entranced Vision of all
Things: The Legacy of Jonathan Edwards says:

Conformity to the world in our churches makes our evangelistic
task all the more difficult. As Nigel Lee of Inter-Varisty
once said, "We become so like the unbelievers they have no
questions they want to ask us." May we so live that people
are made constructively curious.