Its not only Gandhiji, but every tall leader, like Vivekanand, Swami Dayanand, Tagore, Rajaji........Lala Lajpat Rai to Tilak to Patel - everybody opposed conversion.
Even Indian Supreme Court upheld many laws enacted by different different state Govts to protect indigeneous culture/
It was Congress Govt who enacted first laws in states like Madhya Pradesh.
That's the reason, missionaries NEVER GO TO COURT TO CHALLENGE THESE LAWS.
They use Media to whip up anti Hindu, anti-BJP sentiment, as if people are fools.