Personally, I believe the rapture will occur at the time of Messiah's arrival, but it is a widely debated and controversial topic, especially within Christianity where there is little to no understanding in regards to who represents 10-Israel today in the nations. The emotional attachment to the pre-trib rapture is very hard to let go of, but יהוה has made promises to hide those who are His during the time of trial. I list a lot of verses regarding this here... which should bring comfort to those who are fearful of what is coming.
I recommend people consider Dr Gavin Finley's article on The Flight to Bozrah and the Bozrah Exile.
Tim McHyde's book "Know the Future" goes into the rapture topic in great detail in a way that I find palatable.
Shalom,
Hanok
