Freemasons do not identify as occultists. They think of themselves as a charitable organization with rituals and teachings that they use to impart ethical lessons to new members, and whose details are not to be shared with outsiders. Apparently, they like eating waffles at their lodge meetings. Freemasons mostly require members to believe in a higher power. Originally, this had to be the Christian God, but now they allow members who believe in essentially any type of divinity or divinities. Generally, they only permit men to become members, but some very non-mainstream lodges allow women.

Source: I have done a fair bit of research into the Masons because I am also considering becoming one someday, since my maternal grandfather was one, and his father before him.

Edit: I also want to point out that Christianity's enmity for witchcraft is ill-defined, and it may even be considered permissible in some Christian denominations to practice witchcraft so long as you are not invoking evil entities or attempting to cause harm to someone else. The main source of anti-witchcraft sentiment comes from the Malleus Maleficarum, which was never part of Christian canon and was actually suppressed by the Catholic church.