Ali Shariati

Ok, so I understand Ali Shariati’s explanation of religion vs. religion, but what I don’t understand is what exactly is his point?  Ok, so there are the monotheistic religions and there are multitheistic religions.  Why can’t these two types of religions just peacefully co-exist?  I posed this question in my response paper (sorry Professor) but I thought this could be an interesting blog post and hopefully some people can offer some responses.  Why is this such a big deal to Shariati?  Yes, they are completely different types of religions, but why can’t people believe in what they choose to believe in?  A second question that I also want to ask is if there absolutely must be one type of religion (monotheism, according to Shariati) then why didn’t he offer any suggestions as to how to make that happen?  All he basically said was that something needs to be done; we need to “continue the struggle of the divinely-appointed Prophets”.  But that’s all he said.  So basically he is leaving it up to someone else to do his dirty work for him?  Or did I miss something?  Which could very well be the case, considering I read so late at night.  Hopefully someone has some thoughts.