the aikido I know has a very deep philosophical points such as: non violence, non ego/self,
which part should we be more focused on? philosophical or practical side?
I don't think aikido or budo in general to be non violent.
I don't train and I don't teach any philosophical or religious issues during training. We just practice. But I train and try to teach reishiki/reigi.
Philosophical or religious aspects of aikido / budo I discuss with my teacher or students after practice. On the tatami we just train. This is one reason, why seminars are so important.