Dude better you wake up. Here is your loving, humane, godfearing lifestyle:
{will he have to wait for another birth to call himself a brahmin}
He will have to wait for his next birth. All scriptures say that one has to be born a Brahmin in order to be called a true Brahmin. This is said in the Bhagavad-Gita and is supported by all scholars including (surprise) Advaita gurus from like Kanchi Kamakoti Pitham.
Recitation of Gayathri Mantra by a non-Brahmin results in terrible things. Have you not read Uttara Kanda of Valmiki Ramayan?
If he is born as a Shudra, he should perform his duties as a Shudra. Following one's own Dharma is supremely important.
All this being said, I have to express my genuine respect for this gentleman who completely turned his life around and became a Sadguna Sampanna as a vegetarian and other good qualities he has acquired.
