If your children and grandchildren were told lies for years afterwards about why you left the church, you'd stand outside and yell also. Many mormons take it as a very personal affront, as though there were something stolen from them.
Yes, there are lots of Baptists that are probably still telling lies about why I left the Baptist Church.
Although I really don’t feel the urge to stand outside their church and shout at them. Their preachers do enough of that.