So far, in my opinion, "technophobia", from the viewpoint of Marxian class theory is a petty-bourgeoisie problem. Petty-bourgeoisie is "no class" in a class. The petty-bourgeoisie, though may compile the most of the population, is just a bunch of individuals and "lack of class consciousness" is in their very nature. The fear both the capitalist and the workers, because both are organized classes, which the petty-bourgeoisie itself can not become. It either has to be under one of the classes, but it itself can not become the ruling class.
Technophobia is actually originated in the minds of petty bourgeoisie class. It is actually the fear of the losing their own identity as a class and a clear indication that they (the petty-bourgeoisie) in the long run, will be abolished and at present they have to go under either the capitalists or the workers, who can have the power to control the scientific progress. Mechanization and industrial progress in one hand means less labor and therefor more leisure time for workers and the mankind, but on the other hand, it also means end of individualism which is a great point of identity of the petty-bourgeoisie class. As more and more leisure time will be allotted to the working class, the sooner that will end the difference between physical and mental labor and THAT MEAN THE END OF PETTY-BOURGEOISIE CLASS.
Those "leftists(!)", which have technophobia, are actually petty-bourgeoisie leftists, not working class leftists. Yes, petty-bourgeoisie can also become leftists, because the oppose the capitalists which stand in the way of they themselves become capitalists.