What genocide against Hellenism ? If people want to start to practice all that, they're free to do so, see the Neopaganism groups across UK, US and other countries.
Go ahead, build your Zeus shrine in front of your house and start recruiting!
Although we all know which aspects of Hellenism were most interesting, those that were "gracefully" engraved in the pottery left to us from those times.
http://dc.etsu.edu/cgi/viewcontent.cgi? ... ontext=etd