"Iran's Shahed drone has caused havoc across Ukraine", BBC from an article on "Iran retaliation raises questions about US air defences"

If Iran is responsible for who they sell weapons to, and I personally think they are

But if they are, you don't get to stop there, you have to follow that logic

That means all the weapons sold by the UK, and Canada, US, Germany, France, etc are therefore responsible for the mass murder of children in Gaza and the West Bank, and for the genocide