See, the issue here is that you keep mentioning these investment as a means for KSA to modernize its 'economy' - but the lemming you replied to (and most people here tbh) couldnt give a shit less about the economy being modernized, the social and cultural values (rampant human rights abuses, et al.) are the issues at hand. Unless those values change, they'll just go from pretty evil and rich to pretty evil and mooore rich. Which isnt exactly a good thing.
Additionally, you mentioned the individuals and communities that would benefit from this, but that sounds like trickle-down economics to me.
The people who benefit from these massive deals are almost entirely mega-wealthy (like the people who hired you to comment here) and the marginalized communities that face the most difficulties in KSA wont see a dime of this. I mean, KSA is still a slave state for all practical purposes. Doubt google and Msft are going to change that by giving them more data on unwanted elements of their population.
So, like the post above yours says - Fuck them and anyone that does business with them.