These charts are for people interested in reading and learning, it's not for every prole on Earth. I agree in general that it shouldn't be the first on the list however. I would maybe put Engels there instead. Or the gotha program. There definitely is a barrier between these texts and new leftists because of a lack of understand of materialism, idealism, and dialectics. tbh read the wikipedia articles for these things to get an idea, there are also many good articles explaining these concepts in a less 19th century way.
Basically he's saying all materialism is currently wack, it causes them to think that>theoretical attitude is the only genuinely human attitude, while practice is only conceived and fixed only in its manifestation
Feuerbach does not think human activity is an objective activity, which is contrary to Marx's materialism.>>2999
This is a good guide also, you can pick your destiny so to speak. Marx says himself that in all sciences, the beginning is the hardest, and this is no exception.