There are some within other denominations that would have those of us who aren't in their denomination killed as well.
History shows this.
Yes, you have Calvinists murdering Catholics, Catholics murdering Calvinists, Baptists murdering and being murdered by Calvinists, Anglicans persecuting puritans, etc. etc.
All have sinned - and seriously, raising this ruckus on a post where the article in question does not say one bad thing about the Baptist church that the author originally came from - why the entire animus?
Yes, historically, Christians have been terrible to other Christians and, at times, Jews. Thankfully, the days of wholesale slaughter over theology is over, with the EXCEPTION of islam.