I'm assuming good faith debate against my own judgment, but in case anyone is confused, here's your sign:
1st Amendment:
"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."
Read that carefully and note that the word "citizen" is nowhere to be found.
Next, some may argue that "the people" inherently represents only citizens. Jurisprudence has generally accepted that phrase to mean everyone, including illegal immigrants, but it depends on the surrounding context[1]. The idea that the Bill of Rights applies only to citizens, though, doesn't match any court interpretation of which I'm aware.
Unless this quote is directly from the constitution, it's totally worthless to support your argument.