There is no harm for the fasting person to apply kohl, or to put drops into his eyes, likewise to put drops into his ears, even if he was to find its taste in his throat.
If we were to say that there is no rejection to be shown in issues of difference in an unrestricted manner, then the religion as a whole would disappear...
If the person intends the issues of differing (khilāf) [that no rejection is shown towards them], then this is false, it opposes the consensus of the ummah.
The issues of khilāf are broader than the issues of ijtihād and it is permissible to differ in the issues of ijtihād where there is more than one view being supported by evidence.
For shirk and invoking other than Allāh, setting up a deity besides Him or one who is obeyed and followed besides the Messenger [sas] is the greatest corruption on the Earth.
As for the saying of the one who says, 'The base rule (aṣl) concerning Muslims is ʿadālah (uprightness, trustworthiness, integrity, honesty)', then it is baṭil...
We see this doubt being regurgitated by the followers of the likes of Abū al-Ḥasan al-Maʾribī and ʿAlī Ḥasan al-Ḥalabī who invented and spread false principles regarding al-Jarḥ wal-Taʿdīl...