My original point to all this was Ian essentially claimed that Trump was a hypocrite for condemning the Manchester attacker because he has just sold a load of weaponry to the Saudis, who allegedly (we can agree/disagree on that separately) back ISIS.
The reason I called this out is that
1) other than their claim, which I think we can treat with a healthy dose of scepticism as per my original post, there's probably no link to ISIS. Whoever did this was probably not acting as an ISIS operative, even though they claimed the attack after the fact. It's likely to have been this guy and maybe some associates, inspired by, but not by, ISIS. Nor did Trump name ISIS in the comments I quoted.
2) even if ISIS are to be found responsible, there's almost no likelihood that the weapons used in the Manchester attack were provided by the Saudis, much less that the Saudis provided ISIS with US-sourced weapons which were then used in Manchester. The Saudis had nothing to do with this at all (unless there's something we don't know).
On that basis I do not see how Trump's comments can fairly be described as hypocritical. I basically said the same thing myself before I even read his comments, there's fundamentally nothing wrong with that view.