Why? Because my default position is to support whichever country is the greater ally of the West. Because I believe in Western principles, and believe Islamic theocracy is a huge danger to our freedoms and everything I believe in. If the ally was behaving in a way that was extreme then no I wouldn’t support them, but that doesn’t apply here.
Pakistan, like Gaza, hides behind the fact its atrocities are carried out by splinter or terrorist groups, so they can deny knowledge and pretend to be a small and picked on victim. Because India is following the rule book and confirming the response as an official operation with government authorisation, of course everyone will say they’re a big bully and that ‘Pakistan denies this, Pakistan denies that, why are they attacking them’.
Before you call me selfish for ‘blindly following whichever side is closest to the UK’ let me point out that is literally what every other country in the world does without accusations of selfishness, and predominantly the Islamic ones - when have you ever seen an Islamic country take the side of the non-Islamic party, or bother themselves with supporting a non-Islamic country at all? Any protests, any marches against Russian aggression? Nope.