Seven Day adventists are the usual supporters of the "Sunday worship = mark of the beast" thing.
And if this is true don't you think other pagans and/or heathens had worship on the other days as well?
This is old information as I've talked about it here for years now. In addition it's a lil bit more complicated than how you're presenting it.
Not all churches have 501 c3 status, so you can't say all churches will be required to marry gays.
Yes, but you can worship on everyday of the week, 365 days of the year, 24-7 and still be on your way to hell. What does it matter?
Which sabbath are you referring to? There are several sabbaths in Judaism. Moreover, due to persecution, many of his disciples were ostracized, kicked out of the temples and had no way to observe a lot of the things previously did.
So are you saying they all conspiried together to institute sunday worship, or are you saying it happened over time due to the actions of these parties?
Finally, are you familiar with the greek and latin new testament texts? A yes or no will suffice.