Of course other people come to Uman for the normal reason of praying by the grave of a tzadik in the hope that in his merit ones prayers will be answered.
But I did not want address this issue here. The first issue seems to me to be more interesting.
What you see is people that want to keep the Holy Torah but can't stand to be near any orthodox rabbi under any circumstances what so ever.
Personally I can relate to this feeling. But I am not sure of what kind of conclusion to draw from it.