The core values of America have always been that the country is a land of opportunity. This means that the individual needs to take advantage of the opportunities that exist in their life regardless of their present circumstances and improve on that condition. Naturally, the Republican Party is going to highlight those traditional values at their convention. People who have come from difficult circumstances to do well for themselves should be held up as role models for everyone else so as to provide hope for a better future. There is nothing unspiritual or unchristian about any of this.