's ex-boyfriend Emilio Masella
doesn't think the world is ready for Snooki spawn ... including Snooki herself -- telling TMZ, "I hope for her sake ... not to be rude or anything ... but I hope she has a miscarriage."
Emilio tells us he does believe Snooki will eventually be a good mother -- but insists ... there's no way in fist-pumping hell she's ready for it now.
According to Emilio, Snooki has always been flippant about having kids ... and never really grasped the gravity of being pregnant -- "When I was with her, she said she wanted twins. She would always say 'Let’s have twins.'"
Emilio says, "I would def recommend her to get a paternity test to see who the father is because I’m sure there are other subjects" -- adding, "Vinny could easily be the father."
As for how Snooki and BF Jionni's relationship will pan out on her new spin-off show -- Emilio thinks the two will get married ... but Snook will "pull a Kim Kardashian."
Emilio says, Snooks is "going to have the baby and break up with him right after."
Cease and desist letters don't scare Emilio -- turns out Snooki's lawyers secretly threatened to sue him LAST MONTH
if he ever offended Snooki in the media again ... clearly, he wasn't intimidated.