There’s likely multiple reasons.
One that springs to mind is the issue of Social Media being used as a weapon for modern information warfare.
We’ve seen it from the Russian troll farms, right wing disinformation causing riots, influencing elections all the way back to the Cambridge Analytica scandal, With Facebook being accused of selling data to outside companies and of course the spread of disinformation influencing the Brexit vote.
It feels like the left leaning parties world wide want tighter controls on these platforms, especially concerning disinformation and the owners being held accountable for content posted on their platforms.
The right relies heavily on disinformation and will shout the usual “fReEdOm oF sPeEcH” rhetoric in this regard. So it’s likely more beneficial for big tech platform owners like Musk and Zuckerberg to play ball with the right wing populists.
As for Bezos, he’s a sub-human scumbag who’d run his factories like Dickensian Workhouses if he could get away with it, so no surprise on him supporting the types of people who want to crush unions.
Of course this doesn’t apply to your social media empire if it happens to be Chinese owned