couldnt agree more with Doha-Chap2022 & FathimaH.

we are all born without religions. it is from our parents we get it or we change it to another with time & deep understanding.
------------------------------------------------------------

according to my knowledge & what i know, other nationalities cannot get married in DOH, as many cases have been reported where men & women being married in their country of origin or else where, some even having kids & yet being married again without any legalities completed. i had to go through this last year & listed below is my personal experience.

any other nationalities who wish to get married in DOH, should get a certificate / letter signed & attested by the ministry of foreign affairs from their mother country, certifying that he/she is single. also they should have both the parents consent signed in front of a Justice of peace from the mother country & the same doc should be attested from the same JP. if two people meet the above requirements they can visit the relevant embassy in DOH, submit the docs & get married within 2weeks (not sure of the duration) as the embassy once again sends the papers back to their native country for further procedures & once they have got it back the couple can do the legal registration in the embassy.

the process is more easier if you both can go to your mother country, get married there & come back to DOH. yet make sure your girl is visiting your mother country under vacation, for if you wouldn't get a job in DOH & if she looses her job in UAE, both would fall in deep trouble.
------------------------------------------------------------

he has found the girl in the way she is & fell in love with her for who she was & how she has brought up. so if he tries to change her now, in the time to come & after being married, he might even someday point out at her & say "you are not what you used to be" which might create problems between both of them & make it even worse as they are married.

if he converts the wife, very hardly we would find people committing them selves from their body & soul to another religion apart from the originate one.

the girl mentioned in the post might have agreed to convert just for the sake of him or for the love or care which she has for him, he mentions him self as an educated individual, yet inst mindful enough to understand the truth which is within.

he has already put him self in trouble & according to what i see he has very less chance of succeeding in DOH. if he cannot succeed in UAE, being another Arabic country how can he succeed here??

better he returns back to his mother country & get a job there while thinking twice about both the Girl & the marriage. if he brings her here, making her quit from her job in the other country & if he looses the job here both will fall in to a big mess, which is actually created only for the wish of this mindless man!!!