Uh no, let's nip this myth in the bud. Jeans at a wedding or funeral is NOT generally accepted here in Texas.
To each his own, and if your relative's were comfortable with that at their functions, good for them. But most Texans(like anywhere else) consider it tacky and bad taste to show up in jeans at formal functions. We're friendly enough to still be nice, and prefer that people attend even if they don't own suites, but we aren't hillbillies, either. Except for the occassional goof that takes a perverse pride in showing how 'down to earth and 'real' Texan' they are, walking around in extra big hats and odd boots. And we all laugh at them as eccentric showboaters.
In Alaska, many funerals are attended by folks wearing jeans....and sweaters....and even bunny boots. When we attended the funeral of a dear friend a couple of years ago, just about everyone came wearing the same clothes they would have worn to sit and chat with our friend. We have no doubt Mike would have approved. :)
Whoa...I am glad my acquaintances and relatives are not as snooty and rude as you and yours. Yes, I wear Durango boots, Rocky Mountain jeans and a big silver belt buckle with an American Eagle on it (and FYI, I am female)on a daily basis...but showboating? I think not, that dress is common in our area, as common as the gun I carry. And no...I don't line dance, that's for sissies. One final thing...since you apparently have an aversion to country girls and seem to have no problem whatsoever in being rude to them...next time you see a country girl without animal hair on her, will you please kick her butt back to the city for me?