If the president doesn't abide by the courts that's a constitutional crisis, a fundamental problem. Maybe this one instance isn't enough to say that the Trump admin won't abide by the courts, but it's a start. Immigration is not the issue either. It's about the 3 equal branches of government and how one branch is trying to discredit the other. The issue isn't about public perception. The issue is about how the US government will function if the constitution is ignored by the Executive branch.