A terrorist can be on US soil, (I assume you know) and you want our Bill of Rights to "aid" a "terrorist", (assuming, of course that you think the Bill of Rights is an "aid"), simply by virtue of the scumbag being on US soil. That is where I got that "aiding terrorists stuff" from.
Also, Rush mentioned a few days ago that he sadly wondered why in the world some senators and lawyers feel the need to "take up the cause of terrorists' rights."
I have that same wonder about some "freepers".
Illegal aliens are dealt with by various US Codes, -- again, -- under constitutional law, - depending on the criminality of their 'illegal' status. Thus, - terrorists can be dealt with by military tribunals.
Why you seem to be having such a problem with such simple concepts is best left to mental health experts, imo.