I know exactly what they mean. Subsequent to 9/11/01, western media kept replaying those images of the WTC on fire and/or collapsing.
Middle Eastern media kept replaying those images also, but with a "cheering crowd" soundtrack.
Just because Mohammed was a mass-murdering pedophile and liar, and just because Arabian-founded Islam has been butchering and enslaving people for about fifteen hundred years, and just because some Arabs from Arabia and Egypt hijacked some airliners and used them to mass murder thousands of people four and a half years ago, after having their flight lessons paid by wealthy Arabs, is no reason for a negative media portrayal of Arabs.
So everyone involved should just cut it out right now.
If there had been large numbers of "moderate" arab/muslim protesters in this country peacefully protesting the evil actions of 9/11 in every city in the US, and the MSM had showed them, it would have gone a long way toward dispelling any "negative image" or "bias." While there were a few protests, they didn't seem to be very large.