Gated Church?

 

On Haight street, across Buena Vista Park where the bus stops and travelers wait, you can see this building.

I suppose it's a church but I am not so sure :

I have tried to get into the building but the main doors are gated. Other glass doors are guarded by a number code system and when I looked through and waved to the people inside, they beautifully ignored me... Not very Christian, I thought. But maybe they're not.

So I don't know.