We don't know that the shooter was a Christian extremist, do we?
Certainly an attack at a gay club on Latin night screams "nutcase Christian Nationalist", but it's possible that it was a Muslim extremist, too...
The fact that we don't know should tell us something about the hate we're feeding into in this country that's turning us into everything we're against, but go on demonizing gays, blacks, Mexicans, and Muslims, Republicans. Trump's primary victory suggests that voters on that side want more hate speech, more "us vs. them" and more animosity from their leaders.
So now it's time for Coach and Trump to come out and warn us about how Islam wants to destroy our way of life, etc., even though they would have made a completely different argument if it was a white Christian guy. (He would have been a lone wolf acting alone, instead of representative of his entire culture).
Everything has gotten so predictable in this country. Trump will milk this until November.
I don't like the whole "terrorism" frame to begin with. To me, terrorism is a specific act to make people uncomfortable in their normal lives. So all random violence should be included. This, the Dylan Roof racial killings, the guy who flew a plane into the IRS building in 2010, Timothy McVeigh, etc. It gets complicated when you look at something like Sandy Hook. Yes, it made people scared to live their lives, but it doesn't appear that that was the intent of the shooter.
Unfortunately, some people want to make sure that Terrorism is permanently associated with Muslims, to the point where they demand that we say "Radical Islamic Terror" over and over again to emphasize the us vs. them narrative (never mind the 1.5 billion peaceful Muslims around the world).
In reality, governments and media always say Terrorism to describe people they don't like. So when we went into Iraq, people who attacked US troops were "terrorists", not people in a sovereign country defending their homes from an invading army.