Since the Bill of Rights prohibits Congress (and through the incorporation process most of these apply to the states) from restricting speech, press, religion, and all the other rights in the first 8 amendments, that would already protect all persons in the U. S. from laws restricting their rights.
We can't prohibit the free speech of non-citizens because Congress (or the states) cannot pass such a law.
Citizens and non-citizens can be denied life, liberty, and property if due process is used. We can execute people if they commit murder as long as we follow due process.
It would help if we knew what specifically you are referring to.
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