How to inherit object_schema's grants to VIEW and SEQUENCE?

You can use, ALTER VIEW view1 INCLUDE SCHEMA PRIVILEGES;

Yes, views should inherit the same way tables do. I suspect you might have an issue with view/table ownership. For example, if the view was created by a different owner than the table then the view owner needs SELECT WITH GRANT OPTION on the base table(s) (or inherited through schema) to have another user select from that view. The key to that is "select WITH GRANT OPTION".

Sequences don't inherit through the schema privileges like tables and views. You can use ALL SEQUENCES IN SCHEMA on the GRANT for sequences to help. However, I believe it only works for existing sequences and not for future sequences so you would have to reissue after creating new ones.

Why is the message occured?? When I use ALTER VIEW view1 INCLUDE SCHEMA PRIVILEGES;
"View "view" is already set to inherit privileges"