AS for tolerating celibate JWs, forget it... they're already on record as having said it's unacceptable, citing "that's what some of you WERE" ... 1 Cor. 6:9
If you mean two people living together in a celibate relationship then I would agree this would not be acceptable.
If you mean they don't tolerate single, celibate gay JWs the answer is that they do. Bethel is allegedly full of young men suppressing their natural desires . Quite why anyone who is gay would want to be a Witness is beyond me but no one has to sign a bit of paper when they get baptised to say they no longer have gay thoughts and want to be hetrosexual. In fact the latest Awake makes this clear....
In saying “that is what some of you were,” does the Bible mean that those who stopped engaging in homosexual acts never again experienced any homosexual desires? That could hardly be the case, because the Bible also exhorts: “Keep walking by spirit and you will carry out no fleshly desire.”—Galatians 5:16.
Note that the Bible does not say that a Christian will never experience an improper desire. Rather, it says that he or she will choose not to carry out that desire. Christians learn to bring such desires under control, not dwelling on them to the point of acting on them.—James 1:14, 15. [6]
The Bible thus makes a distinction between inclinations and practices. (Romans 7:16-25) A person who has homosexual leanings can control what he allows his mind to dwell on, just as he would control any other wrong desire, including leanings toward anger, adultery, and greed.—1 Corinthians 9:27; 2 Peter 2:14, 15.