The government has no ties to public media in germany. If her allegations are true(which i doubt, why would she even know? Her reporting didn't even touch the topic of the refugees in the slightest)
then these guidelines came from within the broadcaster, not from the government.
Generally it is visible in german media, public and private, that they try to keep the people from drifting too far to the right. Movements like PEGIDA are (rightfully) ridiculed and attacked.
The thing is that german public media is no singular entity like Fox News or CNN. Its just a lot of journalists just doing their own thing, with some editorial guidance, but way less than what we know from most media outlets, so on the one day you might see something very critical of the refugee situation, the next day the exact opposite.
Look at this video posted on the previous page about the effect of islam in germany:
https://www.youtube.com/watch?v=KVWAIKoatWM
Thats also german public media.
Overall it doesn't really make sense to criticize the work of german media as a whole, you'd have to pick single formats.