I think we should fight extremism with passion, and give no quarter.
But if you want to fight the enemy by becoming a replica, you've lost the battle. Allow more Hindu fundamentalism and - politics being what it is- the respected and erudite Hindu scholars will not become our national leaders. No, you'll see the rise of religious trash (like in Pakistan), third rate local sadhus who have no leadership to offer. Some of them are trying to ban Valentine's Day in the guise of culture. Next they will tell you your women cannot wear jeans or trousers. Then, women should not work. Etc, etc.
And my experiences in the West suggest that they are getting more cautious, more prone to suspicion, but not more fundamentalist, extremist or jingoist than they were before. There is a huge difference.