Donald Trump seemingly ignored his grandson at a recent UFC event, RadarOnline.com has learned. An awkward video captured the moment the ex-president appeared to snub his grandson, who was standing beside parents Ivanka and Jared Kushner. Ivanka, Jared, and their son Joseph, 10, stepped out on Saturday to watch UFC 299 in Miami, Florida. As Donald made his grand entrance, he was sure to stop and shake hands with other high-profile attendees, including Barstool Sports’ Dave Portnoy. While Donald looked cheery brushing shoulders with other celebrities, his demeanor appeared to change when he arr…