Phrases And Racisim

Today there was a gentleman on TV.who feels certain phrases should be considered racist and offensive,since at there time of conception they were used in a very different manner.
For example to "hold down the fort" he says,originally meant,to keep the Indians out of the fort, even though we fought the revolutionary war,war of 1812 and civil war,trying to keep ahold of our forts,from the British,white European men and later northern and southern men dressed in blue and grey uniforms,which had nothing to do with Native Americans.
How about the phrase "rule of thumb"this started with how  deeply,by law you were allowed to bruise mark your wife,bet you though it just had to do with an assumed rule to be follow.
Many terms were made up hundreds of years ago in less friendly times,maybe they were considered to mean one thing in their day but have come to be understood in a totally different way.
Since we no longer walk into earthen forts and hold them down or beat women to certain measurements,we can not be considered racist or offensive if the terms we use no longer hold the original meanings.
Should "a bird in the hand is worth two in a bush"or "don't count your chickens til they hatch" be considered fowl abuse.
I have never in my life time caught a bird in my hand and since fowl and eggs can be bought in a grocery store,the future seems pretty safe for the bushes and the birds living in said places,near my residence.
We can be so politically correct that it becomes ridiculous.
Most of us know what a  real racist word or phrase consist of.
Not so long ago many,or maybe it just seemed like many,people felt that words in books like the Bible,should be sex neutral,meaning that the world man,woman,male and female should not be used,since someone might be offended and feel lesser,in some way.
No words like sons,daughters,mother or fathers should ever be put into print,these words did not allow for equality,as if a mother or father role was some how diminished,if it was understood that each had a different genitalia.
We live in a pretty neutral world,most men and women can,in this country anyways,interchange jobs as long as they are equal in knowledge and ability.
This was not so in the times of Jesus and to make the Bible gender neutral is to insult the spirit it was written in,back in it day.
Today we do not have this situation to contend with,a woman can be a doctor and a man a nurse,this was not so only 30 years ago.
Phrases made up long ago and books written in different times,do not put us in the position to feel that the way ideas were put together do not also have different but significant meanings.
believe it or not "turning a blind eye" does not mean we are insulting the sight impaired,but rather not noticing the imperfections of another,be it person or thing.
Some times we have to lighten up and not read things into every aspect of our lives