PR and front tactics

Well, they are definitely not taking into account the problem of the national bourgeoisie in third world and oppressed nations versus the international and imperialist bourgeoisie. When it comes to front tactics, we ally only with working class and proletarian groups (worker's nationalists, Stalinists, Maoists, Anarchos, left social democrats) but with the idea of establishing a vanguard more advanced than the other ideologies aimed at complete socialist revolution. An example would be, lets say, in El Salvador. The FMLN was a front against the Military dictatorship. There were Bolshevists within the FMLN, but there were also anarchists, nationalists, indigenous separatists, etc. Thee uniting goal of that front was political freedom, but it is the duty of the vanguard to also make sure a dictatorship of the proletariat is established in order to prevent any sort of national capitalism from arising, because any capitalism today is linked with world imperialism.

As to the Spain question, and the Greece one by default, here is the issue. When Franco died, the PSOE was at the forefront of the democratic revolution. During the 30's, the PSOE was broadly Marxist and was mostly made up of Bolshevik-Leninists and Left Communists. But by the time Franco died, the PSOE lurched to the right, using Stalinist Popular Front tactics and establishing a dictatorhip of the bourgeoisie instead of socialism, which is what they claimed to support. This was an outright betrayal of the working class and is the inherent reason why Popular Fronts don't bring about revolution and why Permanent Revolution is needed for a socialist world.