So get entangled with that poster and you will be entangled with someone who just said Jesus is insane. And also advocates infanticide.
Lie down with dogs, get up with fleas.
To be fair, he didn't assert this to be true; he merely proposed that as an option to calling Jesus a liar. Which is no different than the "lord/liar/lunatic" argument famously outlined by C.S. Lewis. Which is itself a false di- (or tri-) -chotomy, but that is another discussion.
From http://www.bibleinterp.com/articles/Goren_Jerusalem_Syndrome.htm
" The Jerusalem Syndrome is a clinical psychiatric diagnosis first identified in the 1930s by Dr. Heinz Herman, one of the founders of modern psychiatric research in Israel. Subsequent research was made by Dr.Yair Bar El, former director of the Kfar Shaul Psychiatric Hospital in Jerusalem, involving 470 tourists who had been declared temporarily insane. The Jerusalem Syndrome is a temporary state of sudden and intense religious delusions brought on while visiting or living in Jerusalem. Most of the hospitalized visitors were Jews, but many others were Christians. The clinical symptoms usually begin with a vague and extremely intense excitement. The patients often adopt "biblical" or otherwise eccentric clothing, sometimes merging their identity with that of a character from the Bible or having a strong feeling of mission. They typically adopt a lifestyle of religious observance and attach unusual significance to religious relics. The most interesting feature, considering the extreme behaviors associated with the Jerusalem Syndrome, is that the subjects sometimes have no prior history of psychiatric difficulty and exhibit none afterward. These patients, if they recover, are typically embarrassed by behavior they cannot explain...."
Jesus was maybe an early sufferer...