Narra - I completely agree. Everyone should be treated equally and judged on the same criteria.
Conversely, though, no section of the community should be shielded from scrutiny or criticism simply because of their ethnicity, place of birth or nationality.
If it is shown that certain groups within our society put a disproportionate burden on the state than other groups, that must be acknowledged and dealt with objectively.
Also, if it is shown that certain immigrant groups are having a disproportionate negative impact on our society (e.g. the recently reported statistic that 92% of bank card "skimming" crime in the UK is being perpetrated by organised criminals from Romania) then that should be acknowledged and dealt with objectively.
Targeting action in the appropriate place means focusing specifically on the Romanian immigrant community, just as any other problem predominantly associated with any other sector of the immigrant community (e.g. "black on black" gang violence) would require the focus of attention to be put exclusively on them.
The same would apply if a problem were identified that was mainly concentrated within the indigenous British population, of course (e.g racial hate crime).