Meditating and including buddhist philosophy in your life without abandoning previous religious beliefs? Is there a way where someone (for the sake of discussion) who is Jewish by belief and is actively practicing, could meditate and take up certain Buddhist practices without actually forfitting monotheism 

This is just a question to understand theory, not directed to be anything arguementative or offensive 

Thank you and Peace!
I think we can split Buddhism in 3 different levels of commitment:


Meditation, Dana (charity) and basic Sila (precepts). In this level, you can easily keep any peaceful religion, you will benefit from meditation and people will feel you are slowly changing, more inclined to a spiritual life, usually your family/friends/priests/bishops etc. will not see it as a threat.
Lay Buddhist Life. Here you may have some conflicts depending on your religion and how orthodox you are. Lay buddhists may prostrate and take refuge in the Buddha, the Dhamma, and the Sangha. This is where your previous religion may tell you that you are turning your back on them.
The life of a monk/recluse.


So, as long as you commit to the first level, i.e:  meditating; cultivating generosity; refraining from killing, stealing, lying, sexual misconduct and intoxicants, you should be fine with your current religion.

Problems will arise if you want to progress in the Buddha's teachings while keeping your current religion, but it is up to you; the path is there, it is your choice.