I'm sure there would be RC but only until it was pointed out to them that, as you say, they were using the swastika for hundreds of years before Hitler was even thought of and that it was a religious symbol rather than what it came to represent later. Any right-minded person would surely have to come to the conclusion that hindus have the right to use the symbol as they wish.
Of course, they might not like to wear one on their holidays in Jerusalem
That would cause a moral dilema.