Why is Iran increasingly targeting the UAE in its war messaging?

Iranian authorities have increasingly targeted the UAE in their war messaging, warning of stronger strikes if the US and Israel resume attacks. The UAE has been labelled a "hostile base" by Iran, with Iranian leaders warning of a "crushing and regret-inducing response" to any more attacks against Iran's southern islands and ports. The UAE has condemned Iranian attacks and reserved the right to respond, including through military means, while Iran has tried to replace lost sea routes with land routes through neighbouring countries.