Speaking to journalists in Florida, Trump said Israel is being treated "very, very unfairly," maintaining that countries that are "horrible places" never get reprimanded.
He also bemoaned the fact that Israel is "up for 20 reprimands" at the United Nations, whereas nations that are "horrible places, that treat people horribly, haven't even been reprimanded."
Shortly before Kerry’s speech Trump took to Twitter and posted: "We cannot continue to let Israel be treated with such total disdain and disrespect. They used to have a great friend in the US, but.......,"
Posting another one straight after, he made clear that the UN had become a foe of Israel’s.
"Not anymore. The beginning of the end was the horrible Iran deal, and now this (UN)! Stay strong Israel, January 20th is fast approaching!" he added, referring to when he takes over the White House from Democratic President Barack Obama.
During the same conversation with reporters, he refused to directly answer a question about whether Israel should stop building settlements, saying he is "very, very strong on Israel."
Addressing the general activities of the UN itself, Trump said it was responsible for causing many problems rather than solving them.
“So, if it lives up to the potential, it's a great thing,” Trump added. “And if it doesn't, it's a waste of time and money.”
Appearing alongside Trump was boxing promoter Don King who was carrying a number of flags, including an Israeli flag and calling for peace in the Middle East.