CHRISTMAS and other Christian Frivols

Every year is the same. I receive a huge volume of leaflets 'proving' ALL of 'Christmas' is pagan and those who take part 'must be' pagans or backslidden. I KNOW all the arguments but my research mind does not accept them! This is because much that is called 'fact' is (in real fact) reproducing assumptions and guesses put out by one or two 'authorities' whose methodology is dubious to say the least. Yes a small PART of Christmas can be called sin IF those who celebrate it do so in Roman Catholic fashion. Everything else surrounding this 'festival' is open to serious discussion. Same goes for Easter and many other so-called 'Christian festivals'. None of them is commanded by God's word... but is it 'unscriptural' or just 'not found in scripture'? My main concern is not about dubious dates festivals and celebrations... it is about the way some believers became accusers of their brethren once a year after reading either false information or badly skewed information written by supposed 'experts'.