"... If there can be hundreds of Muslim and Christian countries, why is one Jewish state so much to ask?"

I'm unsure if the question is serious or rhetorical, but the answer is...because having ANY country based on and run by a single religion in this world, where every country has residents of 'other' religions, is a bad idea. Adding one more does not solve anything.

There is, technically, a difference between an Arab state and an Islamic state, but making that distinction at the partition of Palestine in 1947 would not have made much difference, as the fights would have gone on anyway.

Of course the Palestinians didn't want a bunch of land suddenly given to Jews...and of course the Jews didn't like being attacked when they thought they were finally getting a place to live where they had some say-so about their status and control over BEING Jewish. And of course the other Arab states didn't like losing territory to this upstart state that they didn't want in the first place...and of course no one was willing to back down or give in when a couple thousand years of religious/cultural bickering were at stake! And of course the USA and other countries felt they had to help defend and support Israel because of various social, religious and political considerations! How could there NOT have been wars and frustration and wrangling and debate over borders and rights and blame for the whole mess?

There is one, and ONLY one reasonable¹ solution to the whole thing...no borders, no fences, no state with ANY religion having official status in the area. Since 3 different religions claim it as a "Holy Land", it should be administered is such a way as to allow them all access and equality. Will it happen? Of course it will not happen...you'd be hard put to find 27 people on either side in the area who would agree to TRY my idea...and even if they did, they would fight for another 50 years over the details of how to administer it. "But they outnumber us.." "But we should have an equal number of votes on the council"..."Well, we should have areas 'they' can't go..."..etc.

(1)note, I say 'reasonable'...there are a couple solutions which are not even easy to contemplate)