What is wrong with deporting illegal immigrants?

I just do not understand why deporting illegal immigrants is such an issue? It is a violation of law and if it is enforced then why do people have an issue with it?

Considering the argument that illegal immigrants do not affect you etc etc., where should the line be drawn? Should everybody be let in and an open border policy for all be followed?

I am a legal immigrant in the states and the resources towards making legal immigration more accessible is never talked about because the focus is always on illegal immigrants. To be honest coming to the states and filling for an asylum is a much easier way to make money and receive an open work permit than trying to do it in a legal way.