Atheists and Cakes

[Angrboda]

Is it usually atheists trying to legalize their disbelief or christians trying to legalize their believes onto others?

Not at all.  I don't mind atheists, but I get sick of the "nutty" atheists protesting everything.  Go be happy atheists without imposing your personal beliefs on everybody else or trying to invalidate others and their beliefs.  If it's not complaining, it's copying.

"Hey, church is stupid, so let's go make our own, so we have a place to complain."
"Look, the churches have tax exemptions.  Let's go complain about them having it and demand equal exemptions."
"Oh no, someone prayed in a public park.  Let's go interfere with their pray time with signs and yelling and insist they remove themselves from public property."

On and on and on and on...

Not all do it, but the ones that do are incredibly annoying.

Advocating for what one feels is good and prudent for people to do, and supporting its enshrinement in law, is everybody's right in the U.S., and, sometimes only to a limited extent, in most other countries. Theists do it all the time. You only seem to have a problem if atheists do it, too. In that you show yourself to be nothing but a whiny hypocrite.