What does a smart Mexican share with a Unicorn? They're both fictional.
Are you seriously saying there are no smart Mexicans in existence?
I'm just joking.
We shouldn't be making jokes about people based on their race.  Did you know that a Mexican invented the colored television?  We should be thankful for that, and for their great cuisine of tacos and burritos that surely enrich both of our lives.
aww cool tbh.
Besides of what I have already listed, Mexicans have done a lot of other great things for society. I'd highly recommend you do some research into this and it would educate you more on how smart Mexicans actually are.