You have a time machine with a single round trip. You hate everyone. And you are lazy. What is the least you can do to completely screw over the world with your one trip through time?
I hate the 'hate' part (pardon the pun) of the question.
I'd rather go back in time and get Jesus and bring him back here so that he can go all 'temple money changers' on today's MAGA Christians asses, give them a proper yelling to.
If there's a jesus with powers in the first place, he could do the holy spirit thing that happened after his death where the apostles proselytized by speaking in languages they (previously) couldn't to people who couldn't understand the native tongue.
I genuinely doubt it. And if he was proven to be truly Jesus and kept saying that then US Christians would either say "He doesn't understand the modern world" or reject him for some other contrived reason (i.e. he was corrupted by modernity, the machine caused him to lose his connection to God, etc...)
Christians are full of hate because they love hate.