@Broseph
I have no intentions to "tar them all with the same brush" but I may need to self-examine to determine whether that would be for entirely mercenary reasons, in the sense of (hypothetically) having something to lose by getting up their noses (business interactions, or seeking employment, say), or in the sense of losing respect of peers by transforming from the "I'm ok, you're ok", accept-everybody type to the grudgingly tolerant or as far as the reactionary, "send 'em back" type.
This country's most recent historical precedent was probably 1914, when there were forced expulsions (or internment) of those of German extraction. Rather than give them the benefit of the doubt, they were assumed to retain sympathies for their homeland and thus needed to be prevented from reconnoitering. (In the lead-up to WWII, they were conducting aerial photography because tourist maps had all likely points of interest blanked out).
So, white people can mass-deport other white people (in those days) and no-one batted an eyelid. We cannot apply the same principle under current circumstances because of the unavoidable racial element to it and worldwide condemnation would be directed at us, for evermore.
I apologise for making argumentum ad absurdam my opening offer, yet again but it is a habit I find hard to break. If we do not tar, we have the needle in the haystack problem, if we do tar and extend that to deportation, it's a massive logistical exercise (3.5m?) and we end up labelled as racists.
Classic no-win situation.