many reasons for the killing of Joseph Smith in 1844 two reasons I'd
like to know the answers to, Joseph Smith running for President of USA
an for helping free black slaves?

I recommend contacting the Church of the Latter Day 
Saints for that answer. In my own visit to Nauvoo nearly 30 years ago,
it seemed that people hated Mormons simply because they had a
different religion, and also polygamy was considered by Christians to
be totally immoral.

Mr. Smith was no threat as a presidential candidate, because there
simply were not enough people who would ever vote for a Mormon leader,
in those days.

I don't remember anything about him freeing slaves. It never came  up
during my visit.

Though not my business, and please do not respond, I must wonder who
on earth suggested these causes for his death. It sounds like someone
with a major axe to grind.

Dear The Truth, 

Like Irlandes, I've no evidence at all that these two were remotely
connected to Smith's death by mob. You can read about Smith's death
here:
Death of Joseph Smith, Jr. 
<http://en.wikipedia.org/wiki/Death_of_Joseph_Smith,_Jr.> 

The main issue of controversy was polygamy; and in fact it was the
hate towards "Otherness" of the Mormons that drove the mob.

In any case, regarding this second reason, Smith's position on the
issue of slavery was ambivalant:
Blacks and Mormonism
<http://en.wikipedia.org/wiki/Blacks_and_the_Church_of_Jesus_Christ_of_Latter-day_Saints>

politicalguru-ga,you need to google the black mormon homepage about
black mormons and the first black mormon to have the priesthood in
1832 only 2yrs after the church was founded alot more information and
history then you know about also google the mormon reform party!