I understand that some people are a bit "slower" than others, but how exactly do you confuse legal immigration with illegal immigration?

I'm really just curious. Both dogs and cats are furry, but I don't know anyone who's ever confused the difference. Are they doing this maliciously or are they seriously that dim-witted?
I understand that some people are a bit slower than others, but how exactly do you confuse legal immigration with illegal immigration?
I understand that some people are a bit slower than others, but how exactly do you confuse legal immigration with illegal immigration?
I understand that some people are a bit "slower" than others, but how exactly do you confuse legal immigration with illegal immigration?
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