When my grandfather moved here he was told they were only taking working able bodied men and that they'd have to pay for their families to be able to come over. So he had to come here, work and then send back for them. If the government here had changed their mind (like the Germans did) he'd likely have gone back too.
Having said that; I don't know the exact situation in Germany, but a lot of the refugees are being told "Okay, just go where ever they'll take you, you can meet up with your families later" and now the deals being changed on them.