As a previous poster commented, could you imagine racially abusing a Southern Asian on a flight from Pakistan? It just wouldn't happen without consequences and if the flight made it to Manchester without being diverted the perpetrator would be arrested on the flight before anyone disembarked.
A friend of mine was on a flight to Barcelona for a three night stag do, at Manchester Airport all boarded, one of their party (who he didn't even know) made a remark to a Flight Attendant about him probably being gay. Police on board within a few minutes then all their party (about 20) thrown off, ended up in Blackpool for 3 nights, in February, Police don't fuck about, respect them, even more so when they're protecting us at vulnerable places like Airports.