The hatred should be directed at the British parliament, though. It was the British parliament that replaced King James VII & II (who took major steps to bring Irish Catholics much closer to equality) with William of Orange (who ushered in generations of Protestant Ascendancy that turned the Irish into third-class citizens in our own homeland). It was Oliver Cromwell who committed a genocide on us, not the Stuart Kings on either side of his reign of terror.
King George V was far more supportive of Irish Home Rule and Independence than the House of Lords was.
Events like the Queen's Jubilee, the Coronation, those all bring in huge amounts of tourism money.
EXCLUSIVE: King Charles's Coronation prompted a surge in revenue for small businesses across the UK, with entertainment venues and bars and clubs being the biggest winners over the long weekend.
www.express.co.uk
The monarchy has de jure powers that it is not allowed to exercise de facto. The abdication of Edward VIII showed that it was Parliament, not the Monarch, that gets to call the shots.
I have many, but I believe that nations should get to chose the form of government they want. The British people have chosen to maintain a constitutional monarchy. I don't support imposing a monarchy on Ireland or the USA, since neither of those countries wants a monarchy. You would know better than me, but I suspect that most in Germany do not want the Hohenzollerns back.
I also just feel that since the monarchy is a big part of Britain's cultural identity (the anthem being "God Save the King/Queen", being called the "United Kingdom", etc...) that since it's a big part of their cultural identity and most Britons wish to keep it, it should stay.