Catholic twisting of scriptures

In mathew12:38-42 Jesus says this-38 Then certain of the scribes and of the Pharisees answered, saying, Master, we would see a sign from thee.

12:39 But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas: 12:40 For as Jonas was three days and three nights in the whale's belly; so shall the Son of man be three days and three nights in the heart of the earth. 12:41 The men of Nineveh shall rise in judgment with this generation, and shall condemn it: because they repented at the preaching of Jonas; and, behold, a greater than Jonas is here. 12:42 The queen of the south shall rise up in the judgment with this generation, and shall condemn it: for she came from the uttermost parts of the earth to hear the wisdom of Solomon; and, behold, a greater than Solomon is here." (Matthew 12:38-42 KJV)...these are words of Jesus in gospel of mathew and if it is true Jesus should be died for 3 days and 3 nights(72 hours).But catholic church has twisted all this saying he died on a friday and rose on a sunday morning,which makes 42 hours at the most.
Besides this in mathew 26:17 and certain other scriptures they omitted the word "before".mathew 26:17 now reads "Now on the first day of Unleavened Bread the disciples came to Jesus, saying, "Where will you have us prepare for you to eat the Passover?" but when "before" is added as in the original manuscripts it should have read like this-Now before the first day of Unleavened Bread the disciples came to Jesus, saying, "Where will you have us prepare for you to eat the Passover?"
In leviticus 23 it's clearly written that passover day comes before the 1st day of feast of unleavened bread.
Also catholicism and most churches claims jesus rose from the dead on 1st day after sabbath.but in gospel of Luke it says- The women who had come with him from Galilee followed, and saw the tomb, and how his body was laid; 56 then they returned, and prepared spices and ointments. On the sabbath they rested according to the commandment.These women had to walk great distance back to their hometown in galilee(100km) and they also rested on the sabbath.In-order to travelback and forth this much at their time will require atleast 12 hours along with the time required for making spices and ointments.So the women with Jesus had to rest on high sabbath day and make their travel to galilee after that day.

Also scriptures tells us they had to rest on another sabbath day after they reached galilee.they started back from galilee at 6pm after sabbath day(note that ancient Jewish days started from 6pm-when sun sets) and reached Jerusalem in early morning to witness resurrected jesus.The day after sabbath is day of 1st fruits.This day symbolizes the coming great harvest on pentecost which comes 50 days after and on this day resurrected Jesus appeared to women and his disciples.50 days after that on pentecost day(alias harvest day) 120 disciples were assembled on the upper room and holy spirit came on them and thus the church was given birth and also the start of the great harvest.

Also in gospel of John it says- Since it was the day of Preparation, in order to prevent the bodies from remaining on the cross on the sabbath (for that sabbath was a high day), the Jews asked Pilate that their legs might be broken, and that they might be taken away. Here "high sabbath" means 1st day of feast of unleavened bread.So from this verse it's clear that Jesus was crucified on the passover day which is also the preparation day before the 1st day of feast of unleavened bread.

So from all this it's clear that Jesus was crucified on passover day(9th hour that is 3pm) rose from the dead 72 hours later.That is on sabbath day 9th hour(3pm),and appeared to his followers on the following day morning-which was the day of 1st fruits.

Also its clear that catholic church omitted the 'before ' from the scripture mathew 26:17 which now reads "Now on the first day of Unleavened Bread the disciples came to Jesus, saying, "Where will you have us prepare for you to eat the Passover?" when it read in the original manuscript like this-
but when "before" is added as in the original manuscripts it should have read like this-Now before the first day of Unleavened Bread the disciples came to Jesus, saying, "Where will you have us prepare for you to eat the Passover?"
In leviticus 23 it's clearly written that passover day comes before the 1st day of feast of unleavened bread.

Why did catholic 'church' do this?To make it in conformity with ancient pagan festival of ishtar(modern easter) so the majority pagans of roman empire can be converted easily to 'christianity' without any conversion.