In this country, as in Europe, Christianity is losing its influence on the culture. Regaining that influence is a worthy cause, as long as it is done according to the principles of God's Kingdom, with love being the main principle.
The ideology used to establish the United States of America was undeniably Biblical; it is based on Biblical principals and moral values. For instance, the formation of a government with checks and balances acknowledged that man was fallen and subject to corruption and dishonesty (a Biblical truth). To keep power out of the hands of just a few, the representative government with the three main branches was designed. Unfortunately, the Biblical principles this country was founded on are being diminished as other ideologies attempt to replace them.
Christianity will never be eliminated, because although it is in this world, it is not of this world. Until Jesus comes and the consummation of all things is at hand, the church will be here, even if it may have to go underground at times.
As a Christian, I think it is a worthy investment of time and energy to regain the parts of our culture that have given way to secular, humanistic ways, and to retain those that still exist. This, however, must be done within the laws of the land (allowing for civil disobedience), and in accordance with the Christian commitment to living by the Spirit to promote goodness, Godliness, moral values, etc.
It is counterproductive to become angry, belligerent, and hateful, and use the tactics of the world. Christians don't need to sit back and let the culture digress without a fight, but we must remember how we are to fight. We are to fight out of a heart of love and compassion, even for those who stand opposed to what we are trying to accomplish. We can love our enemies and at the same time oppose what they are about.
We won't bring the Kingdom of God to the earth in its fullness; that will come when Jesus returns and judges all things and sets them right. But we should bring aspects of the Kingdom of God to every area of influence we have. We should not be delusional and think we will perfectly establish righteousness on the earth, but we should work toward that, because we are ambassadors for the Kingdom of God while we are here.
So, we fight for the rights of unborn children to be kept safe and protected from those who would do them harm. We fight for the right to exist and worship in a free country, and we fight for the right to express ourselves and our faith without censorship. We fight for the continued implementation of Biblical principles that, when followed even by non-believers, bring about the best for a society.
One thing we cannot forget, though, is that ultimately, our main goal is to proclaim Jesus' Lordship. Our goal is to provide every person within our reach the opportunity to understand the Salvation offer that God extends to man through Jesus Christ. We labor first and foremost for the salvation of each and every person we encounter.
We must keep our focus and walk in the love of God. We must be actively involved in promoting the Kingdom, preaching the Gospel, and being involved in our culture in every area we can, and we must trust God to do His part. The Kingdom of God can come to bear in every area of influence that we have - the church can impact and better any society it is a part of.
No matter how hard the world, the flesh, and the devil attempt to minimize and destroy Christianity, it will never disappear. We will never lose, because Jesus is on the way, and God's purposes will be fulfilled. There is no need to fear, the Christian church is the only true reality that will last into eternity. Amen