Regarding Turkey, Egypt and Jordan:
The three countries have diplomatic relations and peace treaties with Israel. From personal experience you can enter Turkey with an Israeli passport, and from people I personally know, the same goes for Egypt and Jordan. So an Israeli stamp in the passport isn't a problem.
Regarding Malaysia, which doesn't have diplomatic relations with Israel:
According to sources online, it isn't a problem either.
If you're still not sure, you should contact your local Malaysian embassy.
Israel doesn't stop anyone from visiting it, regardless of the stamps in their passport (as long as you're not perceived as a security threat).
If you want to be on the cautious side, or want to visit in the future countries that don't allow visitors with Israeli stamps in their passport, you can ask the border control officer to not stamp your passport, but stamp another piece of paper instead. This is explained here and here.
Israel no longer stamps passports at entry or departure, instead they give you a small paper which you should save until you leave the country, so you will not have Israeli stamps in your passport. But take notice that if you travel to/from Jordan or Egypt by land from/to Israel, you will have the Egyptian/Jordanian stamp that shows that you went through a border crossing with Israel.