Saeed the guy to claim the Quran has no violence then try to justify it when proven wrong lmao
That whole verse and several others like it are about killing non-believers, quit trying to act like Islam never preaches it.
It also does not indicate they are talking about Muslims who drop their faith, you could apply turning back from Islam to anyone who chooses not to believe, Saudi Arabia and other Islamic countries will execute those who dismiss the Islamic religion, and you don't think that's a problem? Even if it is purely Muslims who quit believing that's still killing non-believers and a major issue.
Islam has problematic teaching, as does the Bible, it's fair to criticize both and both need reforming, Islam just happens to be much worse.