Donald Trump, Jr. is an idiot, but you knew that. USA Today reports:

Donald Trump Jr. is under fire for tweeting hours after Wednesday's London attack a comment from London Mayor Sadiq Khan from a month ago that terror attacks had become "part and parcel" of life in a global city.

Trump Jr. tweeted : "You have to be kidding me?!: Terror attacks are part of living in big city, says London Mayor Sadiq Khan." The tweet included a link to a Sept. 22 story from Britain's Independent newspaper that includes the quote from Khan asking Londoners to be vigilant following a bombing in New York City. Khan was quoted the day after three bombs exploded in N.Y. and nearby towns, wounding 29 people.

So Trump Jr. grabs a quote from when bombs hit New York City last fall, quotes the London Mayor out of context, and uses the quote against the mayor in a tweet the DAY of a terror attack on London?

The Mayor kept it classy.

But one member of Parliament did take time to address Dummy Junior:

Many Americans on Twitter agreed.

And this one...