In his book, American Fascists: The Christian Right and the War on America, Chris Hedges, himself a graduate of Harvard Divinity School, draws some frightening comparisons between the American Dominionist movement, represented by people like James Dobson and the late Jerry Falwell, and the fascist movements that dominated Germany, Italy and Spain in the mid-20th century.

Chief among the parallels are:

-the courting and enlistment of the disenfranchised and downtrodden as foot soldiers.
For the European fascists it was the victims of economic recession and ruin brought on by the end of the first World War. For the Christian Right it's the victims of the vice and excess of modern society, especially those who come from broken homes or are recovering from drug addiction. In both cases, the movements take advantage of those in a fragile mental and economic state and indoctrinate them.

-the demonization and scapegoating of select groups as the causes of all society's ills
In Nazi Germany it was Jews, Communists, Homosexuals, Gypsies and later Catholics and Slavs. For the Christian Right, it's gays, Darwinists, liberals and 'secular humanists'. In both cases, these groups are accused of conspiring to bring down society from within by recruiting children into a depraved and godless lifestyle. The Christian Right treats gays and liberals in particular in the same way the Nazis treated Jews, teaching its followers to view the world through conspiratorial lenses, believing that anything symptomatic of social decay is the deliberate work of a shadowy cabal of gays and liberals - i.e. 'the homosexual agenda', 'the liberal agenda'.

-the use of nationalist iconography and rhetoric to 'rally the troops'
We all know how the Nazis used patently Teutonic imagery and patriotic language to inspire common Germans to support their radical agenda. The Christian Right is much the same with their use of pro-American rhetoric. Many of these radical preachers practically drape themselves in Old Glory and pepper their sermons with patriotic buzzwords while villifying their enemies as being foreign and un-American [often suggesting that anyone who isn't a Christian Fundamentalist is necessarily alien, coming from Europe or some other godforsaken land]. But what makes the Christian Right perhaps even more insidious is that they seek to destroy the very foundations of American Democracy that they claim to defend, replacing it with a strict theocratic regime. They use revisionist history to great effect, often saying that the U.S. was founded to be a Christian nation, when even a cursory reading of the Constitution and the biographies of most of the founding fathers of the country will reveal that to be a bald-faced lie.

-the demand for perfect conformity and 'purity' in society'
The Nazis infamously sought to purge Germany of all non-Aryans and all others who did not buy into the NSDAP's philosophy. Similarly, the Christian Right obsessively seeks to eliminate the 'influence' of those who do not agree with their narrow, literalist interpretation of the Bible. This means reshaping the country's power structure by filling all three branches of government with like-minded people who will help them remove the wall between Church and State, and then turn over all public institutions to the control of their own fundamentalist church, and outright eradicating those that do not fit into their plan. In other words, all education, social programs, healthcare, etc. would operate under the jurisdiction of Christian Conservatives, who would be able to refuse to help anyone who did not conform to their world view.

-a worldview devoid of nuance in which the individual is devalued
Just as with the European Fascists, the Christian Right embraces an 'us versus them' mentality. In other words, those who are 'saved' according to the narrow, literalist Biblical interpretation that Dominionists follow are universally good and righteous, while anyone who doesn't fall within this category is ungodly. Jews, Muslims, Catholics, 'nominal' Christians, atheists, agnostics, Hindus, Buddhists, and anyone else who is not a Christian fundamentalist and does not accept conversion [historically such conversions often come at gunpoint] deserves to be rejected from society and ultimately cast into the Inferno. No value is given in either movement to a person's individuality. One's entire value as a human being is determined by their compliance or non-compliance with the fundamentialist doctrine.

The one big difference between the European Fascist movements and the Christian Right is the way they viewed violence. The European movements used violence as a means to achieving power - they used force to put down and intimidate opposition until it was either eradicated or beaten into submission. The Dominionists, on the other hand, see violence as an end. Their final goal is the Rapture, as described in the Book of Revelations, which they hold sacred and canonical, even though most mainstream theologians consider it apocryphal. By their interpretation of this scripture, anyone they bring into their fold will be Raptured into heaven, while everyone else will stay behind and suffer The Tribulation and Armageddon. In other words, only after they attain power will come the horrific violence that the Nazis used.

But ultimately, both movements are rampantly anti-democratic and a grave threat to the free and open society.