I have sores in my mouth
All that stuff about Sudras being discriminated against and not being allowed to read the Vedas, etc. is generally recognised as having been put there long after the scriptures had been already written down, probably by people who were pushing their own agenda of keeping their exalted positions in the caste system. It has NOTHING to do with Hinduism. Neither does the concept of "untouchability" have anything to do with Hinduism. It is a social practise. If you find anything in the Vedas dealing with caste discrimination, or discrimination of any kind, it has been put there by men for selfish reasons and is not part of Veda.