The message being that if you commit crimes (as you seem to want to insist that he has) then the only punishment they'll get is being sent home after spending some time in lock up while your government fights court orders.
From here:
Kilmar Abrego Garcia and MS-13: What is alleged and what we know
'On 15 April, White House press secretary Karoline Leavitt also accused Mr Abrego Garcia of
involvement in human trafficking.'
And the White House accused him of being a terrorist:
'a (member of a) designated foreign terrorist organisation...'
And from here:
Trump Promises to Militarize Police, Reincarcerate Thousands, and Expand Death Penalty | ACLU
'
Donald Trump has long identified himself as the candidate of “law and order” but, during the Trump administration, “law and order” translated to a severe approach to criminal punishment and policing that failed to make us safer.'
So you deal drugs, weapons, you're a member of a terrorist organisation, you've been accused of human trafficking and what does Trump do? Nothing more than the equivalent of sending the guy to his room! What an absolute farce this government is. What an absolute joke are their views on crime. What an undeniable joke is the whole shebang.
So much so that you don't know what to support any more. Want to be serious on crime and hit the bad guys with heavy sentences? Darn tootin'! Oh, unless the admin decides not to. In which case it's 'No, no - the poor guy has already spent some time in the local hoosegow. Let him go!'
So, any idea what's going to happen to him if he's sent to Eswatini? Nah, of course you don't. Nobody has told you. The admin has simply said that their going to send him to somewhere almost everyone certainly had to look up on a map.