Why are we proud that xenophobia and irrational fear trumped economic and political common sense?
No such thing was the case. Opposition to what amounts to foreign rule/control - relinquishing national sovereignty, if you will - was the driving force behind it...and that's hardly an "irrational fear".
This makes zero sense from a logical perspective.
...what constitutes "logical perspective" as defined by liberals, you mean. Any opposition to any liberal agenda "makes zero sense" to those on the far left...so, subsequently, in the attempt to browbeat the 'unbelievers' back into line, liberals see to it that those who do hold/publically express opposing views immediately get hit with the 'xenophobe'/'homophobe'/'Mexiphobe'/'this-a-phobe' and 'that-a-phobe'/'racist'/'bigot'/'HATER!!!' treatment...as you've just demonstrated/confirmed above.
'May as well put that dog down. It doesn't hunt anymore. ('Never did for some of us.)