I have heard this stance quite a lot in the media. Of course you can not argue with it. Chinese, Russian, and Middle-eastern sovereign funds are hugely invested in Western infrastructure.
It annoys me greatly that the Britain, the capital of the commonwealth and ancient empire is regarded as clean and Johnny Foreigner as dirty. This is racism. Was North Sea oil somehow cleaner than Arab oil. Yes the middle-east is run by autocratic authoritarian rulers and the UK is a parliamentary democracy but this is all a legacy of Empire.
I accept that the UAE is a conservative autocratic state but the UK is not clean either. The British Army and RAF have long marched and flown over the Arab world and we are to be mortally offended if a football club falls into Arab hands? This is absurd! Your moralism has no basis. This is because we have human rights groups whose focus is on the third world when they should be pointing the finger at Washington, London, Moscow and Beijing. Geopolitical power does not lie in Abu Dhabi now does it.
Another point is that somehow over the last 12 months it has become common practise in the British media to claim that MCFC are owned by the UAE state. We are not. We are owned by Sheikh Mansour and sponsored by Etihad. That is not the same thing but they want to create a moral panic with MCFC at its centre because it fits their commercial strategy of selling news to outraged Liverpool and Man Utd supporters