One year after celebrating the most joyous pride month in American history with the Supreme Court ruling that legalised same-sex marriage, the lesbian, gay, bisexual and transgender community, and the nation as a whole are now in mourning.

Fifty people are dead and 53 were injured when a madman unleashed hell inside a gay nightclub in the wee hours of yesterday.

This is by far the worst mass shooting in American history.

Law enforcement officials identified the shooter as Omar Mateen, a 29-year-old American citizen who lives in Port St Lucie, Florida. He was killed in a shoot-out with police inside the Pulse nightclub. In explaining a possible motive, Mateen’s father told media that his son became “very angry” after seeing two men kiss in downtown Miami a few months ago. Authorities are calling this an act of terrorism.

The nation has been through this so many times in the past decade that we may as well lower our flags to half-mast on a permanent basis.

We were horrified by the slaughter of 27 children and adults at a school in Newtown, Connecticut, in 2012. We were aghast at the murder of 32 people at Virginia Tech in 2007.

The body count in Orlando bumps those two mass shootings way down on America’s grisly and growing tally.

June is LGBT pride month. Parades, festivals and commemorations of the struggles past and present take place all over the country in communities big and small. And it is celebrated at the pinnacle of power. Last Thursday, President Barack Obama fêted 300 guests for his last Pride month at the White House.

Yesterday, there were Pride parades in Boston and in Washington. The last Sunday in June is the traditional date for the parade in New York City.

Today, LGBT people from all over the country will watch performers and listen to speeches at the annual Capital Pride Festival in Washington. Because it takes place on Pennsylvania Avenue, the dome of the US Capitol is a majestic presence in the background. You cannot underestimate the power of being an LGBT person at that festival with one of the most potent symbols of your nation looming so large.

Only the White House lit up in the gay pride rainbow colours last year eclipsed it in its power.

What happened in Orlando is a tragedy for Orlando, for Florida and for the nation. It will reignite the gun debate, for sure. Yet, it is a devastating blow to the LGBT community in America. Whether or not it turns out that the massacre at Pulse was solely motivated by anti-LGBT animus, gay people around the country will feel especially vulnerable during this Pride Month.

One thing is clear, with the shocking toll that killers with guns are racking up, we all must take care.

Jonathan Capehart is a member of The Washington Post editorial board and writes about politics and social issues for the PostPartisan blog