I am planning to visit Israel for a week of vacation next month and realize I have a stamp from Tunisia in my passport, from three years ago and also for vacation.
Would this make any trouble visiting Israel?
I have also few Russian visas for work in my passport as well, what about those?
You would have little to no problems related to the issues you mention, unless you have other issues you haven't mentioned. People with visas from Arab countries routinely visit Israel. The problem comes when people with Israeli visas and stamps try visiting some Arab countries.
You have nothing to worry about concerning the Russian visa.
http://www.jpost.com/Israel-News/Politics-And-Diplomacy/Putin-reaffirms-mutual-ties-470690
Happy travels.
