SAN FRANCISCO (Reuters) – PayPal, the payment processing arm of eBay Inc, said on Saturday that it parted ways with a recently-hired strategy executive after he posted a series of disparaging and at times indecipherable tweets. “Rakesh Agrawal is no longer with the company,” PayPal said on Saturday in a Twitter message. “Treat everyone with respect. No excuses. PayPal has zero tolerance.” Agrawal, who was hired about two months ago, could not immediately be reached for comment. …