How do supermassive blackholes stop star formation?

The question may relate to a massive misinterpretation of the
Universe.

Very massive objects swirl, and swirling does not correspond
with matter being sucked in. A lot of people imagined black holes
as swirling objects in space, but the physics of swirling proves
that matter is not sucked in toward the middle. Actually
our whole galaxy swirls as one and the spiral arms are part
of the central eye opening which is not a black hole, but a
necessary opening. This is where scientists expected to find
a black hole, but there is something else there, something
wide and open as the whole galaxy swirls like a hurricane.

Swirling is a fantastic find in physics which explains black
holes.