Such intransigent behaviour is not compatible with Wikipedia's policies of consensus-building and collaborative editing; it only serves to incite edit wars.  Anyway, could you please explain why you consider the referece a "strawman" and "unnecessary"?  We are talking about Einstein, a well-known socialist, a household name, and the epitome of intelligence.  Also, after reading my previous comment (and the source), are you still contending that socialism isn't opposed to individualism?

Your substitute is not adequate, either: therefore, it is asserted by some critics that socialistic is less individualistic.  Firstly, the use of a weasel words is strongly discouraged at Wikipedia; please read WP:AWW for more information.  Secondly, socialism is less individualistic than what?  This entry is quite ambiguous.  Finally, I have a reputable source to defend my edit, whereas you do not.  Overall, your edit violates two Wikipedia policies: No Orginal Research and Avoid Weasel Words.