Why should anyone be surprised about that? Remember, its the same group that said the president is above the law.
I assume you are referring to the recent ruling about deportations under the Enemy Aliens act. In that case, the results were... mixed. Deportations were allowed, but supposedly the supreme court put certain restrictions in place... requiring hearings within a certain time frame, and setting the venue for such hearings.
From:
https://ca.news.yahoo.com/us-supreme-court-backs-trump-224913571.html
The U.S. Supreme Court on Monday allowed Donald Trump to pursue deportations of alleged Venezuelan gang members using a 1798 law that historically has been employed only in wartime as part of the Republican president's hardline approach to immigration, but with certain limits.... Detainees "must receive notice after the date of this order that they are subject to removal under the Act. The notice must be afforded within a reasonable time and in such a manner as will allow them to actually seek habeas relief in the proper venue before such removal occurs," the majority wrote.... Lee Gelernt, a lawyer with ACLU and lead counsel representing the detainees, framed the court's decision as a win for his side.
Of course the problem is, will the Trump administration actually follow the rules set by the supreme court. I can see a situation where they ignore the rules, still deport people without proper hearings, and the supreme court turns a deaf ear to the rules they themselves set.