What exactly is this "everything we stand for" Khan refers to?
Let's examine his own record on things he stood for to get himself electable and elected..
In 2003, appeared at a conference with a member of the banned terrrorist group al-Muhajiroun. Used his family contacts with extremists to ingratiate himself in the London Islamist scene.
Was chair of the Muslim Council of Britain's legal affairs committee that condoned the Ahmedi murder in Glasgow as "Ahmedis are not Muslims".
Argued in parliament that the cleric Al Qaradawi "is not the extremist he is painted as", even though said cleric has openly supported suicide bombers and is in favor of wife beating and killing gays.
Referred to Muslims who opposed extremism as "uncle Toms"
Khan's conversion from a sectarian Sunni with ties to extremists to a "moderate" Muslim is a very recent one, and obviously politically motivated. Trump is absolutely correct, however clumsy his language is, in calling out this fraud. He has as much to do with radicalizing Muslims in London as anyone.