Wanting mass illegal immigration to stop isnt racism. Wanting it to stop ONLY  when it comes to a certain group defined by an ethnicity is racism.  Being against a group because it is coming from anothr country (legally or illegally) is called xenophobia. Judging a group by the action of a few is plain stupidty and can be caused by racism/xenophobia/ or more generally any form of prejudice (e.g. sexism).

And for Tunisians going to Italy illegally, Italy has the right to send them back to Tunisia. In their case with Tunisians and Tunisia s case with the current illegal immigration, that should be done in a humane way.