The end to the Watchtower organization is foretold in the Bible
Verse 11 that says: "the established place of his sanctuary was thrown down".
Isn't this the Watchtower organization and a foretold end to it?
Yes and no.
Whatever proves to be the 'his sanctuary' will be thrown down/put an end to. That is what is foretold in the Bible. If JW's believe they are God's people and therefore 'his sanctuary' then they should expect the WTS to come to its end by the KFIC.
But there is no proof the WTS are God's people, at least no more so than others claiming to be. Since 1914 is a LIE then so is being appointed in 1919 is a LIE too, so again there is no basis for claiming they are God's people.
Just to note here is that the parallel account to the 'sanctuary' being thrown down is the 'holy city' being trampled by the wild beast/8th king for 42-months. The 8th king is the same as the KFIC/small horn.
[Daniel 8:23 And in the final part of their kingdom, as the transgressors act to a completion, a king fierce in countenance who understands ambiguous sayings will stand up. 24 His power will become great, but not through his own power. He will bring ruin in an extraordinary way, and he will be successful and act effectively. He will bring mighty ones to ruin, also the people made up of the holy ones. 25 And by his cunning he will use deception to succeed; and in his heart he will exalt himself; and during a time of security he will bring many to ruin. He will even stand up against the Prince of princes, but he will be broken without human hand.]
[Rev 11:2 But as for the courtyard that is outside the temple sanctuary, leave it out and do not measure it, because it has been given to the nations, and they will trample the holy city underfoot for 42 months.]
[Rev 13:5 It was given a mouth speaking great things and blasphemies, and it was given authority to act for 42 months. 6 And it opened its mouth in blasphemies against God to blaspheme his name and his dwelling place, even those residing in heaven. 7 It was permitted to wage war with the holy ones and conquer them, and it was given authority over every tribe and people and tongue and nation. 10 If anyone is meant for captivity, he will go into captivity. If anyone will kill with the sword, he must be killed with the sword. This is where it calls for endurance and faith on the part of the holy ones.]
[Rev 17:13 These have one thought, so they give their power and authority to the wild beast.]