Why? Because trump is an idiot. I am truly surprised that any country is speaking to us at all.
It's just self-sabotage and making yourself out to be a jerk. There is something mentally wrong with him. He could have just said I enjoyed spending time and visiting with her and left it that, which is what I would say in general if asked about anyone relevant and asked on tv about it, unless it was known I didn't like them (like Putin, lol). It's just basic etiquette. Dude is lucky he was born into money. He'd never make it in the business world with how he treats others.