Yes it is true. Some Arab countries can make it difficult if you have a stamp for Israel in your passport. One option is to apply for a second passport and what I have done. This is also useful where you travel a lot and need to send off a passport for a visa.
The other option is ASK the immigration officer as you enter Israel to not stamp your passport and put in a piece of paper and they will do that for you.
Countries that are hardest are Syria and Lebanon. You should be fine for Egypt and Jordan.
The other option is ASK the immigration officer as you enter Israel to not stamp your passport and put in a piece of paper and they will do that for you.
Countries that are hardest are Syria and Lebanon. You should be fine for Egypt and Jordan.