I don't think that the community is divided, all community is unanimous in supporting SegWit.
Sorry, I don't have this impression, and I'm not talking about the handful of members that post dozens of pro-BU posts/day (these, probably are paid in some way for it). In the German and Spanish sub-forums some very high-profile members support BU, among them a former Bitcointalk moderator with an important Bitcoin blog. I think it's currently a 60/40 to 70/30 division with the majority being pro-Segwit. In my opinion, in the case of a hard fork, that's not enough to "kill a BTU chain instantly" what would be necessary to preserve Bitcoin's network effect.
You're conflating 3 things
1. Miner support
2. Forum activity
3. Node support
When it comes to miners and forum activity, a division exists. Mining is hard to fake (although we now know that Bitmain's hashrate share is inflated by ASIC Boost). Forum activity is very easy to fake.
Node support is somewhere in between the 2, it can be faked (remember the NotXT nodes?). But still, it appears as if a growing majority of nodes support Segwit. I would argue this is the most important metric.
And further to that, miners signalling Segwit is beginning to grow again. A consistent >30% is now evident, and removing the ASIC Boost advantage will change that figure even more favourably. When we add to that the undecided miners, we could easily have close to or above 50% Segwit signalling. And that's all is needed, simply the fear of block orphaning by the majority faction has pushed previous soft fork activations over 95% very, very quickly after 50% is reached.
So there's no need to worry yourself so much.
Well around 780 nodes are Bitcoin Unlimited and they produce over 1/3 of the blocks. That is a far cry short of unanimous. Saying they aren't part of the community is disingenuous.