Since the red parts are the combined presence of the Saint George's Cross and the Saint Patrick's Cross, I have no doubt that the anti-Christian Left, who endlessly bleat about 'tolerance' and 'diversity' have a visceral, seething hate for the flag already on the grounds that it is a 'religious flag' and most likely prefer the EU or UN flags, or a rainbow flag made by authentic homosexuals.
UNION JACK UNION FLAG OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
The Saint George's Cross has been a focal point of disdain for the 'tolerance fascists' for some time
Great Britain Navy bans St.George flags (Flag said to upset Turks; reminder of Crusades)