tl;dr - I do NOT like Christian Zionists, give me the resouces to understand and address their bullshit

The Christians followers of this have been talking about the "end times" with very little explanation. I tried looking into their most recent ranting and raving about the red heifer theory, but I was shocked to find that the most popular results were from people who genuinely believe that shit.

I want an explanation for this insane theory. There's something deeply antisemitic about it and I want to get to the bottom of it.

I don't want to criticize this belief by brushing it off as a bunch of loonies, dismissively pointing to the beliefs as not worth my time. I want to know exactly what it is so I can properly address it, at least mentally.