Eyeeatingfish, the school actually did the right thing in regards to free speech law, by allowing that statement to be published, since they (possibly against district policy) decided to feature a student page about Trump. It would be viewpoint discrimination to allow only positive (or only negative) comments about him. Now what they could have done, according to the "scholarly" interpretation of free speech law in the US, is decide not to talk about Trump at all, as that would only be content discrimination.
Flapp, the student has First Amendment protection because her actual words are not a threat, even more so because they are political and intended to be private. You are thought policing, which is the ultimate intrusion into civil freedom. This does not mean to say that your muddled arguments could not win in court. In fact they could, as you are on the right side! The "corrupt" interpretation and truth of judicial law is that the big guy typically wins when he really wants to. Our government has indeed punished people by inserting words into their mouths and then punishing them for concocted thought crimes. Unfortunately, people like you make it all the easier for them.