There is no denying the strength of the SNP in Scottish politics. However, we must be hesitant to suggest that their support translates into pro-independence sentiment. Scotland has suffered from a miserable assembly of opposition parties in recent years.
Much like the rest of the UK, Labour has seen as a complete nosedive in support within Scotland. Conservatives have not enjoyed Scottish support for some time, so it is no wonder that the SNP has risen above the rest. If opposition parties sufficiently invested their time in Scotland, rather than solely their English seats, perhaps the SNP would not have the same appeal.
This raises the important question of how SNP support reflects on the independence movement? If the SNP is the only viable and competent option for Scottish voters, perhaps the party's support is not reflective of the SNP's stated goal of an independent Scotland. Additionally, polling has been anything but reliable in recent memory, as evidenced by Brexit and the election of Donald J. Trump in the United States, both of which were not predicted by the majority of polls.
Scottish nationalists should not get too comfortable in their support because it may not translate into achieving their primary goal.