fadfad,
the basic similarity is that both are more about what you do and the way you do it than complicated theological constitutions, as in the case of christianity. islam and judaism agree on the One G!D, that G!D speaks to each group in terms appropriate to that group and that all-encompassing religiously-based law can be extracted from sacred text. because of this, both are in practical terms legal paradigms rather than theological ones. both have an interpretative tradition which has developed the raw power of the sacred text into a holistic system for living by. christianity, by contrast, concentrates far more on the theological side of things. because islam was influenced by both judaism and christianity, it has borrowed what it considers to be the best bits and, as a result, a lot of the practical stuff (like ritual slaughtering, dress codes, interpersonal relations and business ethics) has much in common with judaism, whilst much of the theological stuff is far closer to christianity. i hope this answers your question.
in reference to the post above, i have had words with inhumility before (see
http://www.comparative-religion.com/forum/whats-wrong-with-the-jewish-5660.html ) because s/he continues to insist, despite my attempting to dispel his/her ignorance, insensitivity and general bone-headed arrogance, that the jews must adopt the criteria of islam for prophecy and that therefore we must accept jesus and muhammad and, incidentally, his own ahmadi "prophet" mirza ghulam ahmad - needless to say most other muslims seem to find this unconvincing to say the least, although many of them take the same view, except with the last prophet being muhammad. obviously, the baha'is say the same thing about baha'ullah and mormons about joseph smith and so on and so forth. apparently it is the done thing with other religions to get credibility by telling the jews we have to accept their prophets as superseding or continuing the jewish prophetic tradition. we don't - and the reason for this is that our tradition is self-contained and intended for us. we are not a universalist religion in the sense that we believe that we are better than anyone else, 'saved' or 'elect' or whatever. we are a universalist religion in that we believe every human can follow a path to G!D provided they observe seven basic rules known as the "noachide laws" (read
http://www.jewfaq.org/gentiles.htm) which have generally been worked out by every civilisation on the planet. in other words, virtually everyone is fine. we have extra rules for ourselves, but nobody else is obliged to obey them. that is why jews do not seek to convert others. others seeking to convert us (which is always unwelcome) almost always follow the following process:
1. someone decides they are a prophet.
2. the "prophet" then produces a "revelation", supposedly from G!D.
3. the "prophet" then decides to try and get his "revelation" endorsed by the jews because apparently we're clever like that - it's like getting 5-stars in the michelin guide, religiously speaking: "as agreed by the Jews"
4. the "prophet" then decides that his "revelation" is far easier to understand and therefore "better" or "more modern" than judaism and tells the jews that they ought to ditch judaism and use his stuff instead.
5. the jews tell him to sod off.
6. the "prophet" then mysteriously discovers that judaism was wrong all along and that jews "changed" their own sacred texts in order to conceal the forthcoming revelation from him, the "new and improved prophet".
7. the prophet tells his followers that they should attempt to convert the jews.
8. the jews tell his followers to sod off.
9. the prophet tells his followers that jews are an evil, false bunch of liars and that they should be aggressively targeted.
10. many of the followers interpret "aggressive targeting" to mean "kill".
11. eventually the jews decide they're not going to put up with this any more.
12. the followers then waste everyone's time banging on about this all over the internet in order, apparently, to annoy jews and get up their noses, whilst at the same time maintaining that the jews don't know their own religion.
i am *so* bored by this. i welcome questions, but this constant "you aren't G!D's favourite people, we are" bollocks is not only offensive, but banal and pathetic.
on the other hand, genuine inquiry is always encouraged.
b'shalom
bananabrain