"A growing tension was established between religions as they inter-penetrate geographically."?

Question

Do you agree with this statment?

Answer 1

Yeah.

Get something as important to people as religion meshing together, you're going to have conflict.

It's one thing to get pissed off at those heretics a thousand miles away, but they're much more real when they want to marry your daughter.

Answer 2

It's not inevitably true, but it will be true in the majority of instances, I suspect.
(It also can apply between the branches of one religion)

It's difficult to react strongly to an alien religion you've never encountered, and to vilify a religion
(Person, nation, skin colour...) you're never going to meet is a convenient unifier that that causes little immediate harm or tension, as the reviling is almost totally in the abstract.

But put them together and the mix can be explosive, *especially* if they have been painted as "the others" "the enemy" "the infidels/heathen" in previous generations.

(Do note that other effects operate too... Over long periods, many religions tend to borrow and absorb detail, rituals, and beliefs from one another.)