It's true that they find it difficult to integrate into other cultures. They're both descended from the Ancient Israelites. Imagine fighting your distant family members for thousands of years. War is the only culture they know. Not an easy truth, but it is the #truth. I've witnessed it too many times.
Discussion
I suppose they would say Christian integration is proof of our capitulation, but we have no concept of earthly Utopia. I think this is an essential difference.
They may say that. And it's true. We have no functional concept of Utopia that can coexist with multiculturalist ideals. But Christian and Catholic integration has proven to be far more beneficial than fanatical Islam ones.😮💨😮💨sorry, not sorry.
Well, you added "fanatical" to the Islam, which skews the comparison. Truly fanatical Christians can also be difficult to get along with. Fanatics are always at least irritating.
There are some fanatical Catholics on here, who rant at me in the comments, and they're pretty horrible.
That said, due to all of their derailed rules and rituals dealing with normal, everyday things — like butchering and burials and clothing and separating the sexes and etc. — even the non-fanatical ones are difficult to integrate because they want an extra this and an exception to that and it just never seems to end.
Their religions come along with a lot of cultural baggage that Christianity doesn't have.
That is why you can convert from orthodox Judaism or Islam to orthodox Christianity, and the most noticeable "external" difference is that you start going to religious services on a different day of the week.
This goes back to the concept of circumcision of the heart, from St. Paul's letter to the Romans.
[[book:: Bible | Romans 2:25-29 | DRB]]