Permanent green card removal

She can give up her green card. You have no power to remove it.

Can i sue the us/state govt. for allowing illegals to work here and take my jobs

If they catch the undocumented the government generally puts them in removal. They aren't "letting" it happen any more than police are "letting"...

They're US citizens at birth.

Question regarding I-130 question no. 16; "Has your relative ever been under immigration proceedings?"

It probably doesn't count. In instances like this I fully disclose rather than have them think my client was hiding something. But you should use...

As a Visitor on B2 Visa, I want to start a corporation. Can I do that?

Short answer is: maybe. Depends on your role. The company would have an EIN. You need to work with a business attorney and immigration attorney.

Can I switch employers while on H1B with a marriage-based GC application pending?

You can switch when you get a work card or if the new employer files a new H1B waiting for the EAD (60 days or so) is the cheaper option. A new H1B...

Can international Student make any investment in owning a company.

Depends on your role. Don't spend any money before hiring an immigration attorney to assist.

Can a green card holder take up a job outside USA on deputation from a US firm and still maintain green card

Is it under a year? And will you be employed by a US or foreign company? Sounds like US. A reentry permit might be necessary, if available. If your...

I want to apply for green card. Should I fill under the EB3 category or shall I wait for EB2?

Take a look at the visa bulletin here to see the time before a visa becomes available. You're not going to get a green card fast. It's not a fast...

Joint Sponsor in Same House.

I agree with my colleagues.