Holocaust denial

I have been reading a lot of stuff recently, some of which has disturbed me.  There are a lot of people out there who say the Holocaust, that horrible time in history they taught us about in school never really happened the way they say it did. 

They cite how there's no way camps like auschewits(sp?) had the capacity to eliminate as many people as they said were held there.  They talk about how zyklon-b wasn't really powerful enough to kill anyone, and those showers apparently outfitted with this chemical were actually used for a delousing procedure.  They talk about how it doesn't make any sense to trick people into going to their death when you've already got them in your custody.

I don't know man; holocaust deniers seem to have information to back them up, all kinds of evidence, to which the holocaust sympathizers only have name calling and questioning the motives of those who deny it.  I am someone who really would like to believe that the holocaust happened, if only so that I can believe there isn't a vast conspiracy behind it.  So, any holocaust sympathizers with a good rebuttal to what they're saying?

hey all you fucking holocaust denying idiots
my great grandfather survived the shit
he heard rumors, ran off to france and when the nazis invaded there they started moving trains of them auschwits
he's fucking told me about when you first went in you were in a line.  if you were "lucky" enough to be healthy enough for slave labor you were put in one line.  if the doc examined you and decided you wernt you went to the other line.  people in the other line were never seen again.

and dumbfuck while the slave labor was going on the germans would come to the rabbis and ask them to gather up the younger males and they were never seen again. hhmmmmmmm

why the fuck would my grandpa lie about this shit?  don't make much sense what did he have to gain?  plus, you forget about the thousands of documents of nazi fucks reporting to hitler how many jews they murdered that day