"But is trying to eliminate every other world view the best way to advance the Christian faith? Do believers think that they will win the hearts and minds of people by default? With all due respect to Christian brothers and sisters everywhere, that is a pretty lame approach to evangelism.

The need to have beliefs validated by the world around them reveals a nagging underlying insecurity on the part of some people of faith. It seems that unless their world view is constantly affirmed by what they see and hear in the wider culture, they feel threatened, attacked."

Christianity is based upon fear. Fear of "hellfires" fear of crucifixtion, fear of a vengeful god........
Frightened people in a group can have a tendency towards violence, and a hatred of anyone "different". They should be pitied for their miserable lives, totally devoid of happiness.

No, Christianity is based on the love that the Creator of the universe has for his creation.
" For God so loved the world, that he gave his only begotten Son." -John 3:16a.
However, it is easier for people to understand fear than love and so Jesus' message gets lost.
God loves each and every one of us.

However, it is easier for people to understand fear than love and so Jesus' message gets lost.

You've hit a good point there.

But why is culture responsible for delivering the Christian message? Isn't that the work of the church?

We, the people, have allowed it.

The "church" weather you like it or not IS a culture... and IMO, it sees other cultures as enemies with opposing ideals.

The Church also uses mainstream culture to spread its message and try to win converts... Look at TV, there are countless Christian messages in shows every day.