When a Catholic makes blasphemous remarks about the Church, is his baptism still valid?

If one was baptised as a Catholic, but leaves the Church and blasphemises the Chruch, is the one who left the Church, is their baptism, still valid?

Baptism (a valid baptism) imprints on the soul an indelible spiritual sign. No sin can erase this mark, even if sin prevents Baptism from bearing the fruits of salvation. (CCC 1272, 1280).

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