Those things were made by a japanese man.
Named Sojiro Mizutani.
The red latex were created for the purpose of endless hateful genocide.
He hated life and everyone in it.
So he made the red latex from rituals.
So he did somethings that I won't explain.
He got in touch with a hyper death god and made ultimate sacrifices.
He made it so that the blood of japanese people would make it stronger.
It must be Japanese blood only...
He made a contract with the god and had a high old time.
He had given it all it wanted, but Sojiro gave something extra to solidified it's success.
He offered his life.
And when Sojiro died, he made it a reality.
The Red Latex are a product of Genocidal rage.
All will die.
The blood of the japanese will be used for power and gain, and the heads of everyone else will be ripped.
Genocide has come.
They're alive, they breath life more than take it.