OK this is my understanding!
I believe in predestination (the bible talks about it over and over) but that is one side of the coin.
The other side is free will. We need to do our part, to respond. That is seemingly contradictory, one says "heads" and the other "tails". However, in reality they are just two different views of the same thing.
To answer your question (and I will answer directly), a couple of JWs came to my house last year. They are two old ladies. I invite them in, we drink tea and have the usual round of topics, is Jesus God, who is the Holy Spirit, the Trinity etc. After much time (a whole morning I remember) I stump one on the issue of who is the Alpha and the Omega? She thinks the name relates to "Jehovah" only but I show clearly that it is Jesus' too. Of course, the implications are huge, Jesus is God etc. The other lady tries the usual tactics, a half baked answer with no substance and when I respond tries to switch topics.
Anyhow, the first one is interested so I think, ah great, some hope there! She comes back the very next day unannounced with some dude with "the answer". My wife isn't too impressed (she thinks I waste my time-probably true!) and I finally meet up with them the next week. Anyhow, more "answers", none of them make any sense and we are back on the merry go round, circular debate going nowhere.
When then go I pray and ask the Lord what I am to make of it all. He tells me to read 1 Peter 2
The Living Stone and a Chosen People
4 As you come to him, the living Stone—rejected by men but chosen by God and precious to him— 5 you also, like living stones, are being built into a spiritual house to be a holy priesthood, offering spiritual sacrifices acceptable to God through Jesus Christ. 6 For in Scripture it says:
"See, I lay a stone in Zion,
a chosen and precious cornerstone,
and the one who trusts in him
will never be put to shame." 7 Now to you who believe, this stone is precious. But to those who do not believe,
"The stone the builders rejected
has become the capstone," 8 and,
"A stone that causes men to stumble
and a rock that makes them fall." They stumble because they disobey the message—which is also what they were destined for.
9 But you are a chosen people, a royal priesthood, a holy nation, a people belonging to God, that you may declare the praises of him who called you out of darkness into his wonderful light. 10 Once you were not a people, but now you are the people of God; once you had not received mercy, but now you have received mercy.
Hopefully you see the direct answer I received. Here it is below.
4. Jesus is rejected by them. My whole talk regarding faith centers on Jesus. Their whole faith centers on "Jehovah".
6. My trust is in Jesus. Theirs is in "Jehovah".
7. Once again, Jesus is precious to us who believe but others reject Him.
8. The stumble because of Jesus, because they "disobey the message" and also they were destined for this (two sides of the coin).
9. Wow!
10. Cool.
Well I pray for those two ladies. I leave it up to the Lord, although in many respects He has spoken loud and clear to me about them.
I had a similar situation regarding a JW who died last year. God spoke to me clearly about that situation too (prophetically through events, not the bible that time). He told me loud and clear "unfortunately not everyone makes it".
Anyhow, hope that answers your question?
All the best,
Stephen