This is not a parody account. The full Hamas statement is here. Daily Mail coverage here. Telegraph coverage here.
One of the most amazing things to note about this story is that Hamas, an organisation designated a terrorist group by almost the entire Western world, has a Twitter account. Bear in mind that InfoWars, Milo Yiannopoulos and many other right-wingers have been taken down by the social media giants, and they never blew anyone up. There's something not quite right there.
The Jeremy Corbyn aspect is, well, just what we've come to expect.