I understand that illiteracy had much to do with the way Greeks in the centuries past may have encountered the church. Certainly this was the case in most non Northern European countries. The populace was dependent on an educated clergy to direct their religious life. This usually amounted to following proscribed rites and cultural regulations. However, the people I am talking about live in the 21st century and have college educations. For them to ignore Scripture is without excuse.
Fellow I worked with found the Greek church lacking in interest since there weren't any Bible study groups there ~ he didn't know that of course until he'd started attending a Protestant church that had lots of Bible study groups. It opened his eyes. It may be time to start your very own home mission (snicker). My friend did something like that and ended up with his wife and daughter going to his church, and still attending Greek services.