m8, give me a break, I just got here.
I largely agree with said, except for this part:
In theory, they have that shared interest, but I see that age of socialist idealism (even that of Not Socialism) as passed, sadly. For one reason or another, there no longer is the popular support nor the dialectic in society for Socialism. The only three powers left in the world are Neoliberalism (i.e. modern slavery), religious fundamentalism, and semi-authoritarian nationalism, with significant overlaps between all of them.
Good luck trying to make a Socialist appeal to Muslim and/or African immigrants; they are entirely beholden to Islamism and deeply triggering and problematic racism, or, if not that, then to heroin. The idea that the workers of the world would unite against the oppressors was proven false back in 1914, and things have only gotten worse since then. Dispossessed people no longer see their world in materialist terms, but are retreating into raw tribalism as an escape from the Capitalist hamster-wheel that is reducing more and more of the world to poverty.
One might argue that it'd be better if we could recognize our common enemy, but we can't, and it's foolish to unilaterally withdraw from the brewing ethno-cultural conflicts. You might see yourself as the friend of the working class worldwide, but Ahmed - his brain addled by Jannah and muh kuffar - only sees you as an enemy to be slaughtered.
I recognize the value of Socialism, but I differ from standard Leftists in my pessimism about the program. There won't be a glorious world revolution, nor will people stop being class-cucks. Our future consists of a Neoliberal dystopia of mass unemployment, lorded over by technocrats who utilize the ever-more-sophisticated means of state control to keep the lid on escalating racial violence perpetrated by people who are retreating from the absurdity of the system into savagery: Spengler's war of blood vs. gold.
In part, but people hated each other before the advent of the Capitalist system. The classic mistake of Marxism is that it disregards everything but economics. Personal psychology matters, and our psychology is tribal in nature. We will always feel at odds with the visible foreigners, and we will always see ourselves in a competition with his group for resources: for wealth, for women, for power. The lawnowners might have fanned the flames of racial antagonism, but those flames will not go out on their own, nor were they absent before. Ethnic hatred is a self-sustaining and powerful force in politics. You might not like it, but you have to deal with the psychology people have, not with the one you wish they should have.
Economic reforms might be an answer, but it won't be an answer people will accept as the riots and interracial crime really starts to escalate. Then it'll be raw "us vs. them", and whoever will promise them security will win.