XXXXX - Feminism
Now, my reasoning for this is simple. I decided upon examination of the provided list that it seemed like a list of bad things from the perspective of a young man sporting a neckbeard who wears fedoras (and also probably dragon-themed t-shirts and cargo shorts) and talks a lot about being a nice guy in the friendzone and also about how feminism is destroying the country and/or world.
X - Incorrect; short for "people being incorrect," which roughly translates to "people disagreeing with me."
XX - Females; more specifically, females who won't date nice guys with neckbeards, which in practice means basically all females.
XXX - Sexually Explicit Porn; this doesn't have any special meaning, it just makes fedora aficionados feel even more inadequate than a brief conversation with an average female, which is a lot of inadequacy.
XXXX - Kissing; this harkens to mind physical intimacy with females, which comes with a lot of deep-seated resentment from the poor friendzoned nice guys that makes them feel even worse than watching more or less attractive people do the horizontal monster mash.
XXXXX - Feminism; rather than just being a personal attack, thinking of feminism makes the average neckbeard feel a sense of defensive rage for his entire species, for feminism is the arch nemesis of his kind, at least in his own mind.
See? Simple.