I clearly understand the word ‘legal’, as well as ‘illegal’. You clearly don’t understand the word ‘expedited’. Illegal aliens should not ever get citizenship, much less ‘expedited’ citizenship.
Further, the lines to get in an obtain a green card are very long and a number of requirements have to be met. Further still if they committed fraud to come here illegally then that would likely prevent them from coming here legally. If they have criminal records in the country from which they are seeking to emigrate then that would disqualify as would having diseases. If they falsified documents while here illegally which were submitted to employers or governmental authorities that would likely disqualify them.
Further if they have once been deported and then returned again illegally, I believe that should disqualify them under any sensible plan.