They are not real. Peterson has tweeted against Elmo (which is already pretty weird for an adult who supposedly has a functioning brain) but they are less extreme than the ones shown here.

https://www.thecanadianpressnews.ca/fact_checking/jordan-peterson-x-post-swearing-at-elmo-is-a-fake/article_de2d2468-137f-5ede-8a98-c09fe3ab1bf5.html

https://factcheck.afp.com/doc.afp.com.34LK99G