Different people, in different cultures do things differently. It isn't racist to understand that, or to make allowances for it, but it is racist to judge people who do things differently than you as wrong--

Racist isn't actually quite the right word--"prejudiced" or "bigotted" are probably batter words--If you find those words a bit harsh, "small minded" is a good one, and you might want to remember the old observation about "Big heads with small minds"