No. The government cannot force one specific religion onto the country. The lemon head test is when the government does not fund or give to the churches because by doing this the government agrees with this particular religion. Also, that is why the cost of religious school is so high.
Regarding the court case of burning the flag, Mr. Gregory was charged and convicted, however in 1989 it was overturned because the court realized it was Mr. Gregory’s first amendment freedom of speech, and until now each time they want to pass the law the judge throws it out.
Whenever someone says they are taking the fifth whatever they say something it will use against them in court as a piece of evidence.