Why do parents who hit their kids act shocked when grown kids hit back?

[Vesuvius87]

Honestly if a parent gets hit back by their adult child I'm not suprised anymore. There is a 50% chance you're going to get hit back if you hit first, regardless of who you are.

My father keeps reminding my younger brother (he's now 24) about how he beat/whopped his own father twice and dropped him to the floor. My brother (unremorseful about it) replied that he used to get hit too. It wasn't often but physical punishment was common before, which is bad.

Honestly my father threw hands first in those two arguments they had. My brother hit him back twice last year, literally dropping him. He guilt trips my brother about it at times. Why the hypocrisy? Why do parents that hit/spank (same thing to me, it's still hitting) get all shocked when their adult child one day hits back?

That's another reason I never want to use physical punishment on my child? What on earth would I be teaching him by hitting, that might is right, that as long as I'm stronger than you I can hit you, etc? Meanwhile my father think it's always worse when an adult child hits their parent than vice-versa, I think it's always bad to hit someone you love. You don't hit a loved one, period. Neither it's worse than the other. Wrong is wrong.

Updates

2 d

I fail to understand my father's logic of it being worse for an older child hitting the parent back. All I see is two adults fighting, having a terrible communication, not knowing how to regulate their emotions.
All I see is an adult hitting and getting hit back by someone stronger.

[TonyMetal___1986]

You don't get to hit your parents out of respect!
Your brother is a loser!

[Vesuvius87]

My father hit him with a belt a couple times whenever he couldn't understand his math homework nor get the right answer after his 2nd-3rd explanation. That was abuse right there. As a result my brother developed anxiety, is still under medications and he never learned his math.
Why on earth is someone going to learn by getting yelled at or assault for getting the wrong answered? Why would anyone use a belt or slap the child to teach them homeworks, along with yellings?
My mother had no compassion for my father when it happened because she believed he's responsible for turning him aggressive and creating someone useless.

[Vesuvius87]

Why would anyone respect a parent that can't even control themselves and isn't teaching through example?

[TonyMetal___1986]

I agree with you but i got beaten a lot harder then your brother and i have never laid a hand on my late father, i took care of him till thr last day, he was good with me but when he used to get angry, he smacks me, they were brought up differently and they thought that this is the good way to discipline their kids!

[Bklynbadboy12]

I dont think there shock thst they hit i think they are shocked that they hit them back

[Vesuvius87]

It's pathetic how they think they can get away with it and that their child is going to grow up thanking them for it. I've seen ridiculous posts on Youtube about someone saying how belts, switches and paddles are the best way to raise your child and how they'll thank you for it later on. Sick