The thing which was abolished was, there was a certain Caste which was untouchable.
The Caste system what I am talking about depends on so many things. Like whether we eat meat, which god we follow, which profession we choose.
Since it's existence,
For example, brahmins normally don't eat meat and they normally take up professions such as teachers, and worship God in temples. Vaishnavas normally choose business/traders as profession. Similarly it's different for each caste.
But nowadays this is not followed strictly.(the professionalism, eating meat/not eating and all the above mentioned things)
For example in Christians, there are Romans, cathedral, etc ( sorry if I am wrong as I don't know about these properly ) Similarly in Hindus many things are there. This is just the basic flow. In actual, there are so many castes and sub castes and it's impossible to count them.
Bottom line is, each caste follow different tradition. Like performing rituals differently( marriage and such), and the above things which I mentioned.
We Hindus don't believe in one God. We have millions of God. ( History is that, whoever did good deed and eliminated evil, we considered them as God. Meaning who eliminates evil energy and brings peace to people)
Does it make sense or I confused you?