Is covert xenophobia rife in biology?

Biologists often seem so divorced from the real world that they fall into obvious traps such as xenophobia in their study of the spread of species. There are clearly honourable exceptions, such as those who scour the earth to bring back and introduce foreign species, but the word 'invasive' is being bandied about to imply a desired zero tolerance of species immigation, and man, the usual instrument of such change, is seen as being no part of nature. To me, 'invasive' implies that a particular species is taking over a particular area: if this is undesired, or destructive, it could surely apply equally to native species?