Do I care what Sunnis think about Shiites? No.
This sorta mudslinging from the Saudis has been going on for years, if not decades & centuries.
http://www.freerepublic.com/focus/f-religion/2717607/posts
Though the Saudi’s compadres, aka mullahs in Iran, have publicly called Zoroastrians “fire-worshipping pagans” too. So, no credit to Team Saud for innovation.
At least The mullahs regime allows churches, synagogues, temples, and free worship for non-muslims in Iran, including Yazidis. That’s more than anyone can say for Saudi Arabia.