There are some isolated cases but no hindu has been killed. Still if they want to go to India then its ok. Just remember though majority of hindus in Sindh are dalits and considered by default achut by Indians.
"He was among his people, he thought, and could finally be free. But he is of a lower caste, and when he tried to enter a Hindu temple, he was barred entry by the priest because of it, he said. And when a friend tried to drink from the community water well, he was physically assaulted by upper caste Brahmins who accused him of polluting it."
Real danger of being lynched. But again these people have lived in isolation from real hindus and think of India as some hindu heaven. Its heaven for high caste only.