Isn't it high time people realised there are (at least) a couple of different sorts of immigrants?

On the one hand there's those who come here either with something to offer or learn to offer and become positive members of UK society. They want to be British and are truly grateful for their lives here. They don't forget their origins but they don't try to impose their previous way of life here. Some older immigrants have become as British (or more so) than "genuine" British. They live, speak, dress and carry on their daily lives as British as the British.

On the other hand there's those who come here with the sole intention of getting whatever they can (for nothing if they can?) and either send it back "home" to relatives or send it back with the intention of going back there to reap their ill-gotten gains and lead lives there as "rich" people. Some have absolutely nothing to contribute here, have no intention of contributing anything, they don't integrate, don't speak the language (English), don't mix, have no intention of mixing and really, they create their own corner of their countries of origin here.

Now which of the above is racist? Both? Or does it depend upon which "group" you'd support?