I am not an apologist for either, but I think voodoo comes from a much lower and darker place than Islam, which has only been perverted into an extreme ideology. Voodoo does not originate from a spiritual or divine source, and inherently seeks to distorts to subvert truth. A major segment of Islam ended up that way as a result of distorting it's original teachings.
Not sure how "Islamophobia" compares to "Voodoo-phobia". It's not like it's banned, or there any specific laws that target the faith. Essentially, it is what people mean by a "general societal mindset" or "code of behavior". "Islamophobia" is not as widespread, at least in America, as some people make it out to be. I don't think we'd see and increase in Muslim population, if they were generally, poorly treated. What you don't see is an influx of Western immigrants flocking to Islamic theocracies.