Weird thing to say
Think about how you feel about Islam and the culture attached to it. Its obvious over my time here you care about this a lot and fair play, nothing wrong with that.
Lets go back to your ancestors time though, and assume for arguments sake they were Hindu and forcefully converted. Imagine they feel as strongly about their faith and culture as much as you do about yours. They believe in their hearts Hinduism is the true religion and that its way of life is God's will and a ticket to paradise.
Now imagine how they felt when armed invaders entered their town, killed innocents, their friends maybe even some family, then forced them to convert religion and alter their culture, likely banning any expressions of the previous faith and culture under penalty of death. All their beliefs destroyed, their value system disappeared, what they saw as their devotion to a higher being completely destroyed along with potentially their afterlife.
Now imagine that happened to you and I told you your ancestors would say they were "proud" of what you went through and that they didnt regret it. Wouldnt be a very nice feeling would it?