If we actually approach this appropriately (looking at things via color-blind lens) and some French-born guy talked about his French values he learned growing up in France before immigrating to the UK and someone responded, "well go back to France then" is the comment still disgusting?
Yes, and you're a disgusting person for not seeing why.
"In a field where an overlooked bug could cost millions, you want people who will speak their minds, even if they’re sometimes obnoxious about it."