We only have issue when Israel itself is a sponsor

As we have made clear on our website, neither we nor anyone officially associated with the organisation, sent a single threatening message to anyone associated with the Carey Academy – teacher, student or parent. The IPSC, in common with the BDS movement itself, neither advocates nor tolerates any violent act or threat made in the name of the campaign.
In the unlikely event that anyone has actually made such statements or engaged in such actions – they represent themselves alone. Not a shred of evidence has ever been produced by any accuser to back up the, by now all-too-routine, defamatory claims against the IPSC and thus, we must call them what they are: lies.