I think the crux of the problem is that they are evangelizing with an admittedly different gospel that very clearly contradicts our bible ,and then getting upset when Christians point out the differences. Then they expand that to make the claim that we hate them, which is untrue.
People still think that they can attain heaven by good works and deeds, and advance themselves along the course by their own righteousness, but that is not what God says
As God is no respecter of persons, He will judge all of us and Paul, once again has this to say:
Romans 2:16 In the day when God shall judge the secrets of men by Jesus Christ according to my gospel.
See that? The Christ of Paul's gospel, not Joseph Smith's gospel