Christian Socialism, Islamic Socialism, or just "economically communist, socially conservative". Where are they? If I have to make a prediction in, say, early 1800s, I'd predict that some form of Christian Socialism (not that socialism was well discussed yet at that era) would be the main revolutionary ideology of the future.
Consider the vast majority of "oppressed lower-class people", whether the peasants of Tsarist Russia, slave labor in Brazil's sugar plantations, or even blue collar workers in today's developing countries. Almost universally they have two things in common:
1. They live under the control of an exploitative ruling elite. (It's important to note that the left vs right economic dicothomy is mainly a privilege of developed countries; most other countries follow the political ideology of "corruptly steal as much as possible using all possible means of power").
2. They are immensely religious.
You can kinda see why an ideology that combines the two might be incredibly popular, at least in theory. Sure, workers seizing the means of production sounds nice. But what if Jesus also supports the idea of overthrowing the bourgeois class? Christianity can be easily reinterpreted into supporting socialism, whether the decentralized anarchist version or the Soviet bureaucratic version. Indeed the Puritan cultists who first came to America practiced many tenets of the former. Other religions, given enough reinterpretation efforts, are also similar. And unlike the atheist commies who just die if they get shot during the revolution, you have God to pray into during hardships and if you are killed, you actually go to heaven. One would imagine revolutionary populist churches, demagogues, and imams appearing, declaring the capitalist elite to be the greedy enemy of the Lord that must be vanquished, trying to overthrow older religious establishments or institutions in favor of newer, more red interpretation.
Suffice to say that such ideology will, as is the case with all revolution, turn into its most extreme version before it either reforms or degenerates. This means that one would expect the emergence of terrorist or revolutionary groups that is the combination of Wahabbi-level religious fundamentalism of "throw the gays off the roof" with Maoist-level communist zealousy. Certainly, the moderates will be far more popular - imagine a populist Trump-AOC incarnate that simultaneously promises universal free healthcare and a ban on abortion. Instead, we rarely see either. Where are they?
