The feasts were celebrated by Jesus himself. They are intended as s roadmap to both salvation and the end times timing. The feast of sukkot will be celebrated even after Christ returns. Paul did not impose those celebrations on the gentiles because many would have simply turned them into pagan rituals, such as the Catholic Church did by turning Passover into Easter. They were not a salvation issue.
What most Hebrew roots people reject all traditions of men (in terms of pagan hilidays like Christmas and Easter) and return to the Jewish feasts in order to teach their children (and connect themselves spiritually). The seven feasts are the story of God's longterm plan. They are times of celebration set aside by God.
I do not know of any Hebrew Roots folks who try to insist that everyone celebrate those feasts. They just refuse to participate in pagan rituals. I do agree that all Christians should reject Christmas and Easter as the Bible clearly says that God commands we do not worship him as the pagans worship their gods or according to the traditions of me, as that is an abomination to him.
Jesus Christ (Yeshua) is the Passover lamb, born during the lambing season when the shepherds were out with their sheep, born with the other lambs that would one day, if without blemish, be brought into the house, cared for and loved, then slaughtered for the final meal so that its blood could protect the household from God's spirit of death.
I personally think it is more important that I impart those lessons to my kids than to give them Christmas presents or lie to them about some creepy, fat, stalker guy watching them year round then breaking into our house to eat our food and leave presents from greedy, satanic, corporate manufacturers and Hollywood shills.
The feasts, however, do teach about God, Christ and His return, which is why Hebrew Roots folks celebrste them. They are also a lot of fun. Galatians 4, Paul refers to people who have begun claiming tbe fiests MUST be celebrated, (perhaps under some claim of greater righteousness or even as proof of salvation). Such teachings missed the point of salvation through grace alone. In galatians 4, Paul specifically discusses the children born of Hagar being born into slavery. The inference being those still adhering to the law, are slaves. (The orthodoxy who rejected Messiah and remain under ritual and law and animal sacrifice). Hebrews Roots folks celebrate the feists for understanding and to align their values with the rootsock (Judaism) and to give their families a focus while the rest of Chrisedom is supporting pagan holidays due to traditions of men. Those who understand this will not arrogantly tell you that you must celebrate the fiests. That would be slavery to the law. However, the issue of keeping Sabbath is entirely different because sa bath was made for mankind prior to Israel ever existing. Many seem to teach there is no need to set that day aside for rest anymkre as that was a day abolished by Christ's sacrifice. Not sure any Hebrew Roots folks would agree Paul meant that.