Yes, every horizontal acquisition is anti-competitive. Antitrust violations are a higher bar, you must improperly flex your dominant market position to violate

Yes, every horizontal acquisition is anti-competitive. Antitrust violations are a higher bar, you must improperly flex your dominant market position to violate the law. For that the government would have to show that FB offered an unreasonable price that nobody sane would match or that they threatened to cut off Insta links from FB if they didn't sell, something like that.