I agree that particular example is reprehensible.

I never claimed to condone the actions of the current admin. The examples of people being deported for protesting that I am familiar with are student visa holders. While I don't personally support the examples that I am aware of, I also recognize that in those specific cases the executive branch appears to be within the bounds of the law. I don't even object to the executive branch having the power to cancel the visas of political dissidents in the general case, merely to how they are choosing to apply it.

It's surprising to me to learn that a green card could be revoked for protected speech. That ought to fall well outside the bounds of the law IMO. Green cards and visas are entirely different things.