Tumblr has a large community of people who are either 1) very young and still figuring out how to be a good ally or 2) exaggerate intentionally as a joke or to troll people. I don't think Tumblr posts that could have been written by anyone are a great indicator of the culture on college campuses. I haven't seen it reflected much, myself.
Sometimes there can be a conflict between how older and younger generations approach issues of social justice and inclusivity, and you can see this on college campuses sometimes. But it's rarely just a generational thing and it's rarely a matter that's as simple as some people being right and others being wrong. And in reality, no matter how bold people are online, most people aren't as outspoken in real life. Most people don't like rocking the boat. And that's not always a good thing. It can be hard to find a happy medium.
I think there can be an issue where young people are learning a lot about inclusiveness and social justice online but don't always have a nuanced or mature understanding. So yes, sometimes a student might ask for trigger warnings based on a very simplistic view of what being triggered means, for example. But learning and maturing is what college is all about, and faculty should be respectfully guiding students. It's not like this is the only area where students might bring misconceptions or biases with them to college. There are students who are prepared to argue with their biology professors that evolution is a lie. There are students who will read a rape scene in a novel and argue that the victim was to blame. There are students who don't pay attention to the course content and make ridiculously false claims.
I think when there's a conflict with regards to inclusivity, it's often because a professor or administrator wasn't expecting it to come up and hasn't had to deal with the particular issue before. This is not actually a terribly difficult thing to address, but it's harder when there's a lot of hand-wringing about SJWs and "kids these days." To use the trigger warning example, I think there are some professors who are automatically suspicious of students who bring it up because there is so much stigma about students wanting to be coddled combined with a lack of familiarity with what triggering means from a mental health perspective. If a professor is familiar with the issue, it's easier to treat it like any other accommodation issue and establish reasonable limits.
I also think there's a problem with the media exaggerating things, and people in general reacting negatively because of existing stigma against mental health issues and efforts to support inclusivity. There tends to be an attitude in our culture that people should just "suck it up" if they're struggling and that minority groups shouldn't be given "special treatment." Society also loves to criticize younger generations. So harmless stuff like having therapy dogs to help students chill out for finals week or letting students list their preferred pronouns is sometimes maligned simply because it's seen as unnecessary. Aside from a lack of understanding with regards to minority groups, there can be a tendency for people to romanticize how things were when they were younger and resent the perception thatthe younger generation has it easier or cushier.
Don't get me wrong--there can be an issue with people misunderstanding social justice concepts, exploiting them, or taking an extreme or alienating position. This can be an issue in activist or diversity-related groups. But as someone who works for a college and is connected to diversity and inclusion-related work, I haven't witnessed this. I don't teach, granted, but in my experience everyone is pretty civil. There have been times when I felt a little out of touch with how some of the students feel, or times when I felt like I wasn't on the same page as my colleagues, but I wouldn't say I walk on eggshells. And I think it's important that we consider what will make the students feel included. The culture at other colleges may be different. But in my experience, students are engaged in a positive way.
SJW - Social Justice Warrior.
I figure it's probably been around for a while, but it was during the Gamer-Gate fiasco that I first started hearing it used as an epithet.
It used to mean a person who campaigned strongly for inclusion, feminism and/or LGBT causes.
It has been coopted by men's rights campaigners to mean "bitch who doesn't defer to my superior male opinion."
I'm not certain exactly how the term originated. Before the Gamergate and alt-right crowds got ahold of it, I saw it used more to refer to people who really are toxic within activist communities (like people who threaten others, attack people for very innocent mistakes, or take genuinely extreme views), but it's always been a bit meaningless since people who are prejudiced against social movements tend to see anything that's really different to them as "extreme," and without context, it's hard to know if someone means SJW in the sense of "This person said I was being homophobic and it offended me" or "This person told me to kill myself because I accidentally used the wrong term." And now it's more commonly used as an epithet against anyone who advocates for social justice.