No offense, but there is a clear difference between immigrants and refugees. Immigrants have been screened according to certain criteria that deems them fit to move to this country since there is a reasonable chance they will contribute and flourish.  The Vietnamese refugees were mainly Hoa i.e ethnic Chinese. They controlled much of the retail trade in Vietnam and many spoke English or French. Same with the Lebanese in the 1970s. The Hungarians were literate, educated and familiar with so-called Western society. 

Syrian refugees were screened according to different criteria. They likely don't speak english or french, have no real skills, are poorly educated and don't adapt easily to a country founded on Western values. The amount of resources needed to integrate these refugees fully is comparatively more as a result with less chance of success. Nabel is an exception. Take a look at what is happening in Europe with their integration of Syrian, Afghani and African migrants.