Many people playing “leftist” are this way, sadly. And <insert religion here>, and <insert country name here> as well, but my favorite example is “conservatives”… who despite both the name itself and the claim to want to return to “traditional” values, instead want to radically overthrow everything that has arisen for the past several hundreds of years.
It turns out that it is really, really, really hard to be truly honest with oneself, about whatever it is that we choose to believe.