system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Would a religous wizard face any problems?

I'm not talking about discrimination; just how their powers would conflict with their beliefs. In a particular I'm curious how a Catholic and Muslim wizard would fit in at Hogwarts. 

Likewise; what if a deceitful but devout wizard decided to use their magic to fake modern day miracles (water into wine, helping blind to see, multiplying food etc).
gpt
Hogwarts seems at least culturally christian (they have Christmas and Easter, for example) and the Potters, beloved members of the wizarding community, were devout enough to put a bible verse on their grave. While we don't know enough about the world to say for sure how religion is treated, it seems Christianity is common enough that an expressly catholic wizard wouldn't have any problems from the wizarding perspective. Presumably, the same would apply to an Islamic wizard.   


As for how to fit wizarding beliefs with Christianity, "witchcraft" in Christianity is specifically the act of bargaining with demons for power. HP wizards don't do that- they're born with innate powers, no different then people born with eidetic memories or additional color cones or other rare biological gifts. it would be fairly easy to have a branch of Christianity ok with that. Presumably, that's what most wizards follow. At most, a very devout christian would maybe object to the name "witch".  


Islam (i know less about, so if you know more and i'm talking bullshit, tell me) has a similar divide- the only acceptable "magic" is that granted as a gift by Allah, which the innate gifts of HP wizards can be easily spun as. One issue may be that one of the charges leveled against magic in the Qu'ran is that it's a *secret* art (and thus deceitful and manipulative)- Muslim wizards may well have some objections to the statute of secrecy. The creation of amulets (as in, magical items) is forbidden unless they have the text of the Qu'ran on. So that's probably a thing.  


Of course, if there is a special wizard branch of Christianity, there may well be a similar one for Islam, with their own interpretations of those verses and scholarly work, which makes things like the statute of secrecy and creation of magic items more acceptable (probably leaning on "an innate gift rather then bargaining with Jinn or evil spirits" a lot)  


If you went around making miracles, you'd be arrested for violating the statute of secrecy. What the individual wizard feels about their "miracles" is of course up to their faith and conscience- they would be hardly the first to call people to the Lord by deception, after all.