There shouldn’t be positive posts about white pride. Whiteness is a social construct of privilege founded on the oppression of people who don’t fit that bill.
Be proud of being Irish, Italian, German, wherever, revel in your culture, celebrate the shared history you have with other people and these connections that keep traditions and diversity alive.
But if you say “be proud of being white” that is a whole other thing. We shouldn’t be PROUD of benefiting from a system of oppression.