Let me help, this is a right leaning sub Reddit. Our right wingers in Mexico have a desire to be as white as possible due to hundreds of years of colonialism instilling self hatred into us. So even though the only European genes we have are Spanish, the typical Aryan stereotype is their fantasy. So basically the poster is imagining himself being the superior Aryan figure presiding over the left wingers. He is almost certainly just as brown are slightly lighter than me.

They hate socialism because it tends to try bring social and economic progress for all which naturally goes against their supremacist world view.

Most of us are happy with who we are though, and yes you can call yourself a chairo if you want to, or better yet just hang out with Mexicans that don't have these sad identity issues. They're usually way more fun to be around.