The difference is in attitude.  Some people pushing SegWit basically present themselves very poorly.   They attack people that disagree with them.  Often throw out wild statements like "Bitcoin was never intended to pay for a cup of coffee" and make false claims to try to shore up their supposed support.   Where there is smoke there is is fire.   It is fine that a group wants to fundamentally change bitcoin, but they shouldn't villainize people that just disagree with them.

While you claim BU is dead, there are more BU blocks than SegWit blocks being produced.  That shows there is a clear problem and disagreement.

What I do like about SegWit is it lays a foundation for making progress.   What I don't like about it is that it is taking steps way beyond what is necessary and not really focused on the most immediate issue.   I think a prudent thing to do would be to hammer out a compromise.   However calling a group "Miners Mafia" is really absurd.    

Now the LTC is going with SegWit it would be wise to let that coin lead the way and prove the concepts are sound.   This is an opportunity for Bitcoin to take a smaller more prudent step and come up with something that both the miners and users can live with.  

Getting back on topic it seems like UASF is just a backdoor way to try and force SegWit.    Seriously if SegWit can't stand on its own then there is a problem.