The three cases cited are by the clubs own fans. Mostly because they've won nothing / not hit the heights expected.Western ownership is regularly subjected to heavy opposition. The Glazers are subjected to significant criticism - both from United's fanbase and journalists due to the debt they have imposed on the club. Similarly, Hicks and Gillett received strong criticism and were eventually removed as owners of Liverpool after a court ruling. Mike Ashley is given very harsh coverage by many in the media and across football. Blackpool are still suffering from the toxic ruins of Owen Oyston’s ownership.
The legal-based accusations against City's ownership are due to financial irregularities - specifically alleged breaches of financial fair play. This follows a two year operation after leaks to the German publication Der Spiegel. Assigning a race-related motive to such complex and protracted legal wrangling is possibly unhelpful and problematic. If City are innocent of these breaches then a court will find in their favour.
Yet city and Chelsea get all sorts lobbed. By reds frequently. You're not a red are you?