No harm to India. Pakistan probably cannot sustain a prolonged war with India for more than a week. If the conflict continues, Pakistan would likely turn to the US, warning that the situation could move toward a nuclear confrontation. The US President would then start making calls to indian sides and ask other countries, such as the UK and France, to push for de-escalation. Eventually, international pressure would likely lead to a ceasefire. A similar small episode we saw last year when the USA president started ringing phones to Indian leaders.
The main motivation behind the Saudi–Türkiye–Pakistan arrangement appears to be regional security, especially Saudi Arabia seeking a stronger security umbrella and greater strategic autonomy from the US, rather than creating a direct military threat to such India.
India's nuclear deterrent also remains an important factor. Saudi Arabia and Turkey are already within India's strategic reach, so the addition of a defence relationship with Saudi Arabia or Türkiye does not fundamentally change India's nuclear deterrence equation. They will be limited to statements and some weapons supply at most.
