yeah i mean it doesn't make much sense if you really dig into the detail
it does make sense if you just read a little bit of tabloids, listen to news bulletins on radio etc. in that case it's oh yeah paris bombers travelled around europe freely why don't we limit that instead of letting anyone in & yeah that sounds good helping my sick gran instead of paying some random eu parliament to making decisions for us.
nhs one is interesting because while people think the economy will suffer there's this pervasive belief that instead of providing vast numbers of vital staff and financing through taxes, immigrants are crowding away services from regular british people, so ppl think it will ultimately help public services. i don't think a lot of brexiteers really care if the economy suffers (a little, not full blown recession) if they think the people suffering will just be rich bankers and london professional types.