Only if it were stolen, otherwise no cops would be on the lookout for it. If the bomber is the owner and doesn’t care if people find out who did it, iow, suicidal, then no need to alter its appearance.
Maybe the guy’s business was ruined by all the covid restrictions. Maybe he had family troubles, or was diagnosed with terminal cancer. Or maybe he listened to far too much late night chupracabra/sasquatch/ufo conspiracy radio.