Huguenot were french nobles
Many were nobles from i know.
Those two statements are quite different. The second one is more accurate but still a bit of a stretch. As Ironside says the nobility comprised only a small percentage of the population. Nobility always tended to favour the established religion and generally the religion followed by the Monarch was that of the nobility as clearly that was in their best interests, financially, socially etc. The Huguenots themselves only accounted for about 5% of the French population.
But in any case it's misleading to say that 'Huguenots were nobles'. Some of them were, but as a whole they were largely middle class and associated with skilled crafts and trades as their history abroad shows. I think you'll find this interesting: