Sushe and HaKatan,
1.Ramban states explicitly that there is a mitzva in every time to go to war to conquer Eretz Yisrael. Some explain Rambam’s silence as his opinion that the mitzva of conquering the Land is included in another mitzva or mitzvot.
2. It is far safer in Israel than in other countries where Jews live, especially if one adds regular crime to hate crime.