Regarding the school bombing that killed 150 or more schoolgirls, it is Just my impression but I perceive little outrage in England through watching the BBC TV news and Channel 4 news, another channel respected for its news coverage. The popular press may report the story with outrage but I don't read popular press and do not use social media so I cannot talk of the popular reaction to the tragedy in those media.
Almost all of my friends (none of which are muslim, and only one is a Turk) are cheering on Iran in this conflict.
As the UK is infested with Islamists, I can imagine a lot of Brits are pro-Israel in reaction to this. But here in Australia both the right and left wing are becoming very anti-Israel and no matter how much the government tries to stop "antisemitism" people are steadily become more and more anti-Israel and to an extent, anti-US.
The large refugee waves Muslims into Europe have bolstered the Israeli narrative in Europe, and as a result they have a strong grip over right wing poltics, similar to their stranglehold over the US.
If the US and Israel can't get a decisive victory, this will be a huge knock back for Israeli power in the west.
As a funny side note, a lot of people are calling out the use of women in their propaganda. First we saw this with YPG, then we saw the same thing with the IDF and now we can see Israeli bot accounts posting scantily clad Iranian women dancing. Supposedly this is supposed to increase support from western audiences, in reality its one of the most cringeworthy things I've ever seen. It shows just how out of touch they are.