I used to think the reason the Democrats wanted an open southern border was to maintain a dependent class of Democrat voters, but what if I was wrong?  No, this is still a large part of the reason because...  What if they're here to destroy America the same way the migrants who invaded Europe are destroying every nation they settle in?  ...you'll need a majority population who's not accustomed to freedom to go along with the authoritarian government that would rise from the ashes.