In explaining the posuk (Vayikra 24:10)
וַיֵּצֵא בֶּן־אִשָּׁה יִשְׂרְאֵלִית וְהוּא בֶּן־אִישׁ מִצְרִי בְּתוֹךְ בְּנֵי יִשְׂרָאֵל וַיִּנָּצוּ בַּמַּחֲנֶה בֶּן הַיִּשְׂרְאֵלִית וְאִישׁ הַיִּשְׂרְאֵלִי׃ There came out among the Israelites one whose mother was Israelite and whose father was Egyptian. And a fight broke out in the camp between that half-Israelite and a certain Israelite.
Rashi quotes the Sifra saying
ואיש הישראלי. זֶה שֶׁכְּנֶגְדּוֹ שֶׁמִּחָה בוֹ מִטַּע אָהֳלוֹ: הישראלי ואיש THE ISRAELITISH MAN — this was his opponent (Sifra, Emor, Section 14 1) who had prevented him from pitching his tent in the camp of Dan.
It seems that only one man from Dan opposed this individual from setting up a tent in their tribal area. Does that mean everyone else felt he technically shouldn't have been kicked out, though according to the letter of the law he didn't belong in Dan's campgrounds? (If everyone felt he should be moved, why wasn't there an entire tribal protest in the form of "Shevet Dan v. Egyptian man," rather than "Israeli man v. Egyptian man")
[Note: This answer suggests he should have camped with the Erev Rav, but if that's the case then why didn't everyone in Dan protest? (Unless this anonymous man was the Nasi or other Shliach Tzibur)]