Infiltration = entryism?

edit

The article seems to define political infiltration purely in terms of 'entryism.' Wiktionary defines infiltration as 'the act of entering a physical location and/or organization secretly.' But Wiktionary has no entry for entryism, and the Wikipedia entry fails to specify the use of secrecy. This is surely an important distinction, 'infiltration' sounding, and being, much more conspiratorial/predatory, in organisational terms.