It isn't 'inability', it is 'lack of will'.
Okay, if you want to make illegals felons, where would you keep them? How would you deport them? Even if you had the will to do it, you would need the logistical wherewithal to make it happen. No one on these threads has indicated how incarceration or deportation would happen. You have not done so either. Unless you can tell me how this will happen, don't talk to me about "will."