Are faith and acts of worship considered invalid due to not belonging to Salafi thought, rejecting some of its views, and differing on some of the postures in prayer?

Salafism is a methodology based on the Qur’an and Sunnah according to the understanding of the righteous predecessors. What was mentioned is not related to it, but rather to the stances of some who affiliate themselves with it. Issuing fatwas without knowledge and disparaging scholars are blameworthy actions, while combating innovations is a commendable endeavor. Defaming scholars is an abomination, and the flesh of scholars is poisoned. Sheikh Al-Albani is a great scholar, and his status should not be diminished, even if his authentication and weakening of hadiths are not adopted. As for the description of standing for prayer, it is not among the nullifiers of prayer, and it is recommended, not obligatory, to face the Qibla with one's feet.