As-salamu alaykum Ustadh, is it permissible to cut of family members who don’t pray and for example they also have Sufi and Shia friends, and question Allah saying “why Allah this and that”. جَزَاكَ ٱللَّٰهُ خَيْرًا

You can distance yourself from whomever you want if they are bad for your religion or bad for your life in general, or if they harm you in your Deen, Dunya, and the hereafter (but of course, not your parents). We use the word "distance" rather than "cut off" because distancing is a personal choice to minimize harm that is being done to you. If they say "Salam alaikum," say "Walaikum as-salam." If there is something you can do for them or send to them that doesn't harm or jeopardize you in any way, shape, or form, then that is not a problem.