BBC is for REMAIN like MSNBC is for the Democrats.
For the most part all of Europe and much of the world dislikes Trump because they think he threatens their country. This is understandable. The world knows they have a gravy train with Obama at the helm.
well i think now that the vote is over, the issue is what happens in the future, which is a question that is up to the new UK leaders and the prospective new leader of the free world. He does not really have to make a public appearance if it is going to be as bad as you say (though i would imagine that at least some would welcome him).
in particular, it would be a huge potential advantage to trump to be seen rubbing shoulders with UK leaders, even if only unofficial. UK leaders in turn would snub him at their peril if he wins. UK has more to lose from future lack of support from the next US president than vice versa. Meanwhile meeting with UK leaders would demonstrate back in the USA that the attitude of the USA MSM as exemplified by the WP article is in essence total hogwash.