CNN didn't "false flag" Manchester - a single guest (A "terrorism expert") on a single show, speculated about likely cause of the attack and discussed the activities of the extreme right in Europe, but also said ISIS was the most likely reason when asked, before there was any confirmation about...
Its a rather obscure reference, i think, to this moment after the Westminster attack where Pip Schofield walked over Westminster Bridge "in tribute and defiance". ie: for KT - a perfect example of something she often rails against - celebrity "virtue signalling"...