>>9088It hurts worker solidarity to the extent that people let it hurt worker solidarity.
Again and again in my historical readings, "diversity" is a factor in the failure of Leftist projects.
Or rather, what injured, impeded, or imploded these projects and initiatives wasn't that it was full of diverse groups from disparate races, cultures, and religions, but that, depending on the case, there were interested parties that benefited from racial or ethnic conflict, sections of the proletariat that hadn't cast off their illusory connection to "their" country or delusions of patriotism, particularism which prevented different groups with likeminded objectives from uniting in solidarity, or qualities within portions of these groups which prevented collaboration on other integral projects.
Examples:
Chicago Steel Strike of 1910: the strike fails in part because of the lack of participation of black workers. Racism was a factor particularly on the union side as some refused to admit or solicit black workers, but on the other side were interested parties in the black community that would have had their influential positions threatened by unions giving black workers further agency, particularly among the preachers and ministers of the black religious communities.
Second International: A major contributing factor in its collapse was WW1 and many workers abandoning the international to throw their lives away dying in an imperialist war.
In the 1960s inspired by groups like the Black Panthers, other identity groups formed such as those for Asians and Hispanics in the Western United States. Each pursued their own interests, accomplished little or nothing, and then became little more than advocacy groups for privileged portions of those populations. Sometimes these groups were dedicated to identities which encompassed reactionary views and mores, such as the strong current of sexual chauvinism and machismo in Chicano culture which put them at odds with other groups whose interests otherwise aligned.
Again and again the pattern if divisions causing strife plays out, but again and again it isn't the differences or diversity of these groups per se, so much as these differences were able to be exploited by interested parties, and for every instance of "diversity" causing division you can find examples of extremely diverse groups of people coming together to overcome these imaginary divisions in order to succeed, such as the 1912 Lawrence Textile Strike.