Timid Faith, Full-Blown Immigration and Other 'Conservative' Selling Points

It's sad to say but much of what the 'modern conservative' movement stands for isn't actually Conservatism. True Conservatism is based off the Bible, which isn't a subjective collective of casual opinions by God, but rather, the Bible is an absolute statement of truth by God Almighty Himself. 

How can unrestrained immigration be good for America? If we bring in many thousands upon thousands of peoples who don't share our beliefs, our religion, our government, our social values etc....how can that turn out good for our country?