Modi is a really bad guy. He’s a Hindu nationalist, with a cult-leader like personality.
He and his henchmen are talking openly about genocide of Christians and Muslims.
Really bad.
He is, in fact, persecuting Nazarenes of all kinds, but it’s not because of theological reasons. He’s fine with non-Indians practicing whatever religion.
It’s because he is very much a proponent of the caste system.
They also have a real problem with freak show Muslims, and Nazarenes and Muslims are viewed collectively as invasive religions.
The caste issue is the Anglican Church there, in particular, (much more conservative than in England, ironically) and the Roman Church (and probably a lot more; my knowledge of denominations is poor) are popular with the lower castes and teach that the caste system is wrong, that we (they) are equal.
It’s disruptive to India’s society.
I personally think that’s a good disruption, but I’m not Indian.
Anyway, that’s the reasoning. It’s only indirectly religious. Not an opposition to Nazarenes in general, but mainly to people getting above their station and uppity, as a result (which again I support).
But you need to know where they are coming from to deal with them, even if you disagree.