I don't suppose for a moment that should any of the above descriptions actually be accurate that anyone invited them here. Illegal immigrants have been a problem for a long time and no-one yet has found a complete answer to it. We cannot simply close the borders but the latest controls, involving biometric passports and much tougher entry requirements will help.
As a country we need to have a controlled level of immigration to ensure that we can maintain our services. Anyone who argues against that does not really understand the demographics. With our ageing population we cannot survive just by postponing the retirement age. Hopefully we can exclude the criminals through proper screening so I hope that you do not intend to classify all immigrants as "vermin". Rather a lot of us are married to one!