It is not the Christian thing to gloat or rejoice about the death of an enemy. Senator John McCain dying though, has not upset me, let me say. McCain embodied all that we oppose, and as a political leader was of the Merkel school of anti-Western globalism, opposing any sort of protection for the West. There is a body of internet material, not just from the Right, alleging that McCain was not a war hero, but a traitor who in his capture collaborated with the VC and communists, producing propaganda:
https://www.unz.com/runz/american-pravda-when-tokyo-rose-ran-for-president/
https://www.counterpunch.org/2008/06/13/mcnasty/
http://www.unz.com/article/mccain-and-the-pow-cover-up/
Traitor or not, now he has to face his own fate and judgement. President Trump has not been invited to the funeral, and no doubt he would not wish to go, even just to make sure that McCain is down for the count.