Questions: Religion & Spirituality

There's this belief in my religion that a woman mustn't enter a temple (to do anything - pray, etc) when she's on her period as it (the period) makes her impure and dirty. My mother supports the belief 100%, meanwhile I think that the belief is ridiculous and oppressive.
She said that, "Would anyone like it if a dirty person who wore dirty clothes came in the temple? It's the same for a woman on her period. Blood is coming out from her vagina, which can spoil, ruin the floor, so the rule was made that a menstruating woman must be prohibited from entering the temple."
There's also a belief that a woman mustn't touch, you know, grains and other things. She had to get help in taking some wheat out of the box from me just because she was on her period, for the same reason - period makes women impure and dirty.
I had asked, "Our blood doesn't pour in the grains, does it?"
"But our shadow does."
So, even the shadow of menstruating women is bad!!! ?


If I am correct, how can I convince her?

Jason Francis was hit by a car, reportedly driven by a pizza delivery worker, near the home he shared with his partner Alice Robinson in Perth.

Following his death, Ms Robinson, who was said to have been left “heartbroken”, was found dead.

More than 30,000 Australian dollars (£16,000) has been raised for the bereaved families of the couple, believed to be from Market Drayton, Shropshire, since a fundraising page was set up on Christmas Eve.

Mr Francis had been on a day out with some other friends from the rugby club who organised a taxi home for him on Saturday evening.

The 29-year-old was on the carriageway in the beachside suburb of Scarborough when he was hit by a white VW Jetta, driven by an 18-year-old man, Western Australia Police said.

Sam Diamond, president of Cottelsoe rugby club, which Mr Francis had joined at the beginning of the year after moving to the area, said he understood Ms Robinson had gone outside to investigate when she saw the flashing emergency lights.

He said: “She was told by first responders that it was Jason they were working on.”

He said she had been left “heartbroken” by her partner’s death, which was confirmed at Royal Perth Hospital.

He said: “We don’t know what happened to her after this. I know the police have launched an inquiry into it. She has gone missing after notifying some of our friends of what’s happened (to Mr Francis) and hasn’t been found until the next morning.”

A police spokesman said: “Police will investigate this matter and prepare a report for the coroner, which will include the full circumstances leading to the woman’s death.”

i asked this because i ask myself if god exists because if he does why doesn't helps healing humanity like seriously bruh living in this world is meaningless. for centuries we try to leave our mark but when the world ends with the rest of it there ain't be any proof that we existed, so what if our life is just a merely illusion huh?