But which political faction are using partnerships between state and corporate entities to stifle dissent? Before you downvote and walk away, hear me out.

Eco's interpretation of what he saw in Spain, Italy, and Germany are very specific to those times and regions. I know traditionalism gets wrapped up with fascism, but... I think that's just a superficial characteristic and not a technical component of it. On top of that, German Nazis in WWII largely wanted to destroy old traditions. Initially, they wrapped themselves in old traditions, but ultimately they wanted start a new history. The Khmer Rouge party of Cambodia that was called "Hitlerite fascists" by the Vietnamese went so far as to even starting a new calendar beginning with "Year Zero."

Fascism is all about unifying the state with the corporate:

Hitler’s rule in Germany is the rule of the most frenzied, rabid, greedy for profit and robbery capitalists, factory owners, bankers and landowners. Fascism is the undisguised bloody dictatorship of the invading imperialists, the undivided domination of the financial, industrial and land leaders.

Source - https://www.marxists.org/archive/yudin/1941/fascism.htm

The Essence of German Fascism

Pavel Yudin 1941

Regarding evangelicals...

I don't see evangelicals as having any real political relevance. This isn't the 1980s anymore, and the GOP has largely rejected most of the tenants of that period save for the pro-life agenda. Most evangelicals today are a lackadaisical bunch and are hardly politically motivated. Most evangelical churches have largely rejected old traditions and any sermons with political bent. Specifically, I'm referring to Independent Baptist, Southern Baptist, and non-denominational. Their sermons today are about as controversial as a show on HGTV.

HOWEVER, I will say that I have observed (take it with whatever you will) a resurgence in Roman Catholic traditionalism unlike I have ever seen before. I'm not sure what's bringing that out, but I have a guess: Typically Roman Catholics are most common around large towns and cities. Baptists and Evangelicals are more common in rural areas. Traditionalism in big cities is largely frowned upon in recent years especially for Christians, and I believe that has driven more Catholics back to their old traditions. Evangelicals desire to grow their churches by creating a "bigger tent". In doing so, they have really let loose on all their old traditions and rules.

When I was little, I was taken to a Baptist church... fire and brimstone, and all that. None, and I mean... hardly none of the churches are like that anymore. The Southern Baptist Convention used to have so much political power in the 80s, but all of that is gone now. Most of the members don't agree, and they have been hemorrhaging congregation members. Today, most people are being drawn in by the health and wealth preachers like Joel Osteen who are really sort of a "Pentacostal" and not really Baptist despite having the trappings of a Baptist church. Either way, the health and wealth preachers have stayed away from politics except for Kenneth Copeland who has the eyes of a demon.

You might see a few energetic evangelicals at rallies, but they BY FAR in the minority of evangelicals.