I’m not sure what ‘’fundamentalism’’ means to different individuals here. Some clearly see it as a derogatory term.
I do remember this sutta however, where Venerable Mahá Kassapa, the elected head of the First Council. Cúlavagga Xl,1,1 (ii,284) cautioned:
"Come, friends: let us recite the Teaching and the Discipline before what is not the Teaching shines forth and the Teaching is put aside, before what is not the Discipline shines forth and the Discipline is put aside, before those who speak what is not the Teaching become strong and those who speak what is the Teaching become weak, before those who speak what is not the Discipline become strong and those who speak what is the Discipline become weak."
So, to me, it seems that as long as a modern teacher is in line with the Dhamma, and doesn’t alter the fundamental meaning of the Dhamma, then various methods may justifiably be used to teach the Dhamma in a wide variety of cultures.
---The trouble is that you think you have time---
---Worry is the Interest, paid in advance, on a debt you may never owe---
---It's not what happens to you in life that is important ~ it's what you do with it ---