Isis murder a homosexual man (but presumably it has nothing to do with Islam)

I see that Isis have begun the holiday season by ‘executing’ (or murdering) a man who they say was homosexual in Syria/Iraq. They did this in the traditional manner, by throwing him off a tall building and then stoning him to death. They have helpfully provided photos of the process online.

An accompanying statement from Isis reads:

‘Following the example of Muslims Caliph Abu Bakr Al-Siddiq (ruled 632-634), the Islamic court in Al-Furat province sentenced  a man who performed acts of the people of Lot [i.e.,homosexual acts] to be cast off the highest place in the town and then stoned to death. Allah’s command [is valid] in both the past and the future.’

If they deign to notice this, I expect the usual people to now say (a) That this has nothing to do with Islam/ is not Islamic/is more to do with Buddhism than Islam.  And (b) That thirty years ago some Christian fundamentalist attacked an abortion clinic so it’s really not worth worrying about.