Why return to islam or any faith for that matter?  What ever happened
to progresive revulation and being greatful of life, Not that of mans
own written fears?

Dear One JonJon, 

Your approach is of course a rational approach. If you seek to
understand those who seek to return to their religion (or convert to
another religion), there are several possible explanations.

Some people seek to "return" to their traditions or religion, because: 

(1) They feel that religion provides them with structured life and
with support for their decision that they could not find anywhere, had
they decided to follow your rational approach. The religious
environment provides social support for a person to stick with the way
of life they have chosen, and not everybody could follow a path
independently.

(2) They feel that religion provides them with moral and spritual
answers that cannot be found outside this faith. They need the
transcendental dimension, some sort of divine inspiration, that would
guide them.

(3) They "return" because they want to be connected with their
ancestry, with the heritage, with what they believe to have been the
righteous ways of former generations. Sometimes it has to do with some
life circumstances. For example, they have immigrated and feel
detached of the traditional environment, and seek to restore some
sense of security by re-aligning themselves with their religion; or
they have children, and suddenly they would like to provide their
children with a link to their heritage.

You can read more about it at: 
BeliefNet discussion: "Why do people convert to another religion"
<http://www.beliefnet.com/boards/message_list.asp?boardID=426&discussionID=358334>

Paul Connelly, 2002. The Persistence of Religion
<http://www.darc.org/connelly/religion3.html> 

I hope this answers your question. Please contact me if you need any
clarification on this answer before you rate it.

I thought this was an excellent and insightful answer. Thank you for
posting it, politicalguru. If I could give you five stars, I'd so so.

Thank you Pink.

I agree, but would venture to add another point.

If one grew up going to church, there is an emotional element.  As an
adult, one might have gotten out of the habit, moved away (as I have),
not missed it, maybe even rationalized about not caring  - until
something sets off the emotional desire to return.  That could be many
things, from a wedding or baptism or burial service  - or just
"nothing better to do" on a Sunday morning in a place where one's a
church of one's religion is, maybe an historical building worth
viewing, or just out of curiosity after many years.  Whatever, one was
there and discovered  that one had good feelings at hearing the
familiar liturgy and hymns, and wanted to repeat having those good
feelings.  And the people were nice, too.
That is not deeply religious motivated, but neither is the related 3rd
reason given by Politicalguru, which can apply for attending mother
language services in a foreign country.

As for Islam:  disregarding  - PLEASE -  for the moment how we may
feel about Islam or our own religions, Islam makes the logical claim
of any religion that it is the one and only true belief; infidels
can't be blamed too much for not yet having recognized this, but
apostates from Islam get harsher treatment.  A Muslim finding
him/herself back in a Islamic community  - either in an Islamic
country or in one in another country -  would from his/her own
knowledge the religion feel a compunction to return to the practice of
the religion.

Myoarin

In addition, some even go towards logical answers (i.e. the miracles
presented in the Bible and the proof of modern science in the Quran).
I have seen many people convinced of a religion by seeing miracles in
the Bible and Scientific fact in the Quran.