So, right off the bat, there's the law as it is, and then what people can stretch the law into as you slide towards fascism. On this side of the border I expect rule of law to hold, at least in the medium term. If you were in the US my answer might be very different.

Per the charter you have to target an identifiable group directly, and by past precedent, it seems like you have to specifically incite genocide. A lot of people get away with stopping just short, or even going all the way, but only online or in semi-private. The main successful prosecution I can think of was a guy openly leaving neonazi swastika pamphlets on people's doors.

IANAL, but that specific offence cited is pretty clearly about attacking places of worship. If you drive up on a church lawn and park across the entry walkway you might have a problem. Otherwise, you're just declaring affiliation with a different, hostile religious group, and that's your business. It's like an evangelical with a sticker against praying to saints, basically.